Wolfgang Kowalsky

Wolfgang Kowalsky
Bildnachweis: Annika Oruc/Alle Rechte bei der TU Braunschweig

Prof. Dr.-Ing. habil. Wolfgang Kowalsky

 

Geschäftsführender Leiter
Institut für Hochfrequenztechnik

Leiter der Abteilung
Hochfrequenztechnik & Photonik

Raum 121, 1. OG
Schleinitzstraße 22
38106 Braunschweig

Labor für Elektrooptik Bienroder Weg 94 38106 Braunschweig Telefon: +49 531 391-2001/ -8001 Telefax: +49 531 391-2045 wolfgang.kowalsky[at]ihf.tu-bs.de

 

Arbeits- und Forschungsgebiete
Lehrveranstaltungen


Veröffentlichungen und Vorträge



 

Arbeits- und Forschungsgebiete







Organische und Oxidbasierte Halbleiter und Halbleiterbauelemente




Dünnfilmprozesstechnologie für Organische (Opto-)Elektronik


Lehrveranstaltungen







Grundlagen der Leitungstheorie (WS)




Flachdisplays (WS)




Quantenstruktur-Bauelemente (SS)


Veröffentlichungen und Vorträge





2014

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Veröffentlichungen:

Al-Mahrous, R.; Caspary, R.; Kowalsky, W., "A Glue Splicing Method to Join Silica and Fluoride Fibers With Low Attenuation," Lightwave Technology, Journal of , vol.32, no.9, pp.1669,1673, May1, 2014 doi: 10.1109/JLT.2014.2309349 URL: ieeexplore.ieee.org/stamp/stamp.jsp




2013

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Veröffentlichungen:

Holger Spahr, Christine Nowak, Felix Hirschberg, Johannes Reinker, Dirk Hente, Wolfgang Kowalsky and
Hans-Hermann Johannes

"Enhancement of the maximum energy density in atomic layer deposited oxide based thin film capacitors"

Appl. Phys. Lett. 103, 042907 (2013), http://dx.doi.org/10.1063/1.4816339

Holger Spahr, Tim Bülow, Christine Nowak, Felix Hirschberg, Johannes Reinker, Sami Hamwi,
Hans-Hermann Johannes, Wolfgang Kowalsky

"Impact of morphological defects on the electrical breakdown of ultra thin atomic
layer deposition processed Al2O3 layers"

Thin Solid Films 534 (2013) 172-176, http://dx.doi.org/10.1016/j.tsf.2013.02.076

Holger Spahr, Johannes Reinker, Tim Bülow, Diana Nanova, Hans-Hermann Johannes and Wolfgang Kowalsky

"Regimes of leakage current in ALD-processed Al2O3 thin-film layers"

J. Phys. D: Appl. Phys. 46 (2013) 155302, http://dx.doi.org/10.1088/0022-3727/46/15/155302

Matthias Böttger, Tobias Graumann, Redouan Boughaled, Frank Neumann, Wolfgang Kowalsky, Hans-Hermann Johannes
Development of a new qualification method for photocatalytically active surfaces based on a solid state luminescent dye, Journal of Photochemistry and Photobiology A: Chemistry, Volume 253, 1 February 2013, Pages 7-15, ISSN 1010-6030, 10.1016/j.jphotochem.2013.12.012.




2012

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Veröffentlichungen:

Sven Ammermann, Christian Hrib, Peter G. Jones, Wolf-Walther du Mont, Wolfgang Kowalsky, and Hans-Hermann Johannes
Pyrrolo[1,2-a]quinoxalines: Novel Synthesis via Annulation of 2-Alkylquinoxalines, Organic Letters, Vol 14, No 19, 2012, pp 5090-5093

Matthias Böttger and Björn Wiegmann and Steffen Schaumburg and Peter G. Jones and Wolfgang Kowalsky and Hans-Hermann Johannes
Synthesis of new pyrrole-pyridine-based ligands using an in situ Suzuki coupling method, Beilstein Journal of Organic Chemistry, Vol 8, pp. 1037-1047 2012

Wiegmann, Björn and Jones, Peter G. and Wagenblast, Gerhard and Lennartz, Christian and Münster, Ingo and Metz, Stefan and Kowalsky, Wolfgang and Johannes, Hans-Hermann
A New Framework of a Heteroleptic Iridium(III)-Carbene Complex as a Triplet Emitting Material, Organometallics, Vol 31, No 15, pp. 5223-5226, 2012

Caspary, R.; Schutz, S.; Mohl, S.; Cichosch, A.; Johannes, H.; Kowalsky, W.; , "Polymer optical fiber amplifiers," Transparent Optical Networks (ICTON), 2012 14th International Conference on , vol., no., pp.1-4, 2-5 July 2012

H. Marciniak, M. Teicher, U. Scherf, S. Trost, T. Riedl, M. Lehnhardt, T. Rabe, W. Kowalsky, and S. Lochbrunner
Photoexcitation dynamics in polyfluorene-based thin films: Energy transfer and amplified spontaneous emission Phys. Rev. B 85, 214204 (2012).

J. Meyer, S. Hamwi, M. Kröger, W. Kowalsky, T. Riedl, and A. Kahn
Transition Metal Oxides for Organic Electronics: Energetics, Device Physics and Applications Adv. Mater. (in press).

A. Lange, H. Flügge, B. Fischer, H. Schmidt, M. Wegener, T. Riedl and W. Kowalsky:
Optoelectronic Devices Based on Ultra-Violet Light Sensitive PVK:PCBM Layers
Synth. Met. 162, 522 (2012 ).

T. Winkler, H. Schmidt, H. Flügge, F. Nikolayzik, I. Baumann, S. Schmale, H.-H. Johannes, T. Rabe, S. Hamwi, T. Riedl and W. Kowalsky
Realization of ultrathin silver layers in highly conductive and transparent ZTO/Ag/ZTO multilayer electrodes deposited at room temperature for organic devices
Thin Solid Films 520, 4669 (2012).

Diana Nanova, Sebastian Beck, Andreas Fuchs, Tobias Glaser, Christian Lennartz, Wolfgang Kowalsky, Annemarie Pucci, Michael Kroeger
Charge transfer in thin films of donor-acceptor complexes studied by infrared spectroscopy, Organic Electronics, Volume 13, Issue 7, July 2012, Pages 1237-1244, ISSN 1566-1199




2011

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S. Hamwi, T. Riedl, and W. Kowalsky:
An organic p-i-n homojunction as ultra violet light emitting diode and
visible-blind photodiode in one

Appl. Phys. Lett. 99, 053301 (2011).
♦ unter den "Top 20 Most Downloaded Articles" in August 2011

H. Schmidt, T. Winkler, I. Baumann, S. Schmale, H. Flügge, H.-H. Johannes, S. Hamwi, T. Rabe, T. Riedl, and W. Kowalsky:
Indium-free bottom electrodes for inverted organic solar cells with simplified cell architectures
Appl. Phys. Lett. 99, 033304 (2011).

M. Pfannmöller, H. Flügge, G. Benner, I.Wacker, C. Sommer,M. Hanselmann, S. Schmale, H. Schmidt, F. A. Hamprecht, T. Rabe, W. Kowalsky and R. Schroeder:
Visualizing a homogeneous blend in bulk heterojunction polymer solar cells by analytical electron microscopy.
Nano Lett. (in press) (2011).

T. Winkler, H. Schmidt, H. Flügge, F. Nikolayzik, I. Baumann, S. Schmale, T. Weimann, P. Hinze, H.-H. Johannes, T. Rabe, S. Hamwi, T. Riedl, and W. Kowalsky:
Efficient large area semitransparent organic solar cells based on highly transparent and conductive ZTO/Ag/ZTO multilayer top electrodes
Org. Electron. 12, 1612 (2011).

M. Lehnhardt, T. Riedl, U. Scherf, T. Rabe, and W. Kowalsky:
Spectrally separated optical gain and triplet absorption: towards continuous wave lasing in organic thin film lasers
Org. Electron. 12, 1346 (2011).

M. Lehnhardt, T. Riedl, T. Rabe, and W. Kowalsky:
Room temperature lifetime of triplet excitons in fluorescent host/guest systems
Org. Electron. 12, 486 (2011)

P. Görrn, M. Lehnhardt, W. Kowalsky, T. Riedl, and S. Wagner:
Elastically Tunable Self-Organized Organic Lasers
Adv. Mater. 23, 869 (2011).
♦ highlighted in Nature Photonics 5, 128 (2011).




2010

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T. Rabe, S. Döring, N. Hildebrandt, T. Riedl, W. Kowalsky, U. Scherf
Optical Gain in Foerster Energy Transfer Based Organic Guest-Host-Systems
Mat. Res. Symp. Proc. 1197E, 1 (2010).

H. Flügge, H. Schmidt, T. Riedl, S. Schmale, T. Rabe, J. Fahlbusch, M. Danilov, H. Spieker, J. Schöbel and W. Kowalsky:
Microwave Annealing of Polymer Solar Cells with Various Transparent Anode Materials
Appl. Phys. Lett. 97, 123306 (2010).

J. Meyer, H. Schmidt, W. Kowalsky, T. Riedl and A. Kahn:
The Origin of Low Water Vapor Transmission Rates Through Al2O3/ZrO2 Nanolaminate Gas-Diffusion Barriers Grown by Atomic Layer Deposition
Appl. Phys. Lett. 96, 243308 (2010).

H. Schmidt, K. Zilberberg, S. Schmale, H. Flügge, T. Riedl, and W. Kowalsky:
Transient IV-characteristics of inverted polymer solar cells using titaniumoxide interlayers
Appl. Phys. Lett. 96, 243305 (2010).

S. Hamwi, J. Meyer, M. Kröger, T. Winkler, M. Witte, T. Riedl, A. Kahn, and W. Kowalsky:
The role of transition metal oxides in charge generation layers for stacked organic light emitting diodes
Adv. Funct. Mater. 20, 1762 (2010).

J. Meyer, M. Kröger, S. Hamwi, F. Gnam, T. Riedl, W. Kowalsky, and A. Kahn:
Charge Generation Layers Comprising Transition Metal-Oxide/Organic Interfaces: Electronic Structure and Charge Generation Mechanism
Appl. Phys. Lett. 96, 193302 (2010).

T. Riedl, T. Winkler, H. Schmidt, J. Meyer, D. Schneidenbach, H.-H. Johannes, W. Kowalsky, T. Weimann, and P. Hinze:
Reliability aspects of organic light emitting diodes
IEEE International Reliability Physics Symposium, Anaheim (USA), pp. 327-333 (2010).

M. Lehnhardt, S. Hamwi, M. Hoping, J. Reinker, T. Riedl, and W. Kowalsky:
Charge carrier densities in chemically doped organic semiconductors verified by two independent techniques
Appl. Phys. Lett. 96, 193301 (2010).

M. Lehnhardt, T. Riedl, T. Weimann, and W. Kowalsky:
The impact of triplet absorption and triplet-singlet annihilation on the dynamics of optically pumped organic solid state lasers
Phys. Rev. B 81, 165206 (2010).

M. Debeaux, M. W. Thesen, D. Schneidenbach, H. Hopf, S. Janietz, H. Krüger, A. Wedel, W. Kowalsky, H.-H. Johannes:
Charge-Transporting Polymers based on Phenylbenzoimidazole Moieties
Adv. Funct. Mater. 20, 399 (2010).

M. J. Zöllner, J. S. Frähmcke, M. Elstner, U. Jahn, P. G. Jones, E. Becker, W. Kowalsky and H.-H. Johannes:
A New Synthetic Approach to Thiophene-Nickel(II)porphyrin Hybrid Molecules and their Electrochemical and Computational Investigation
Adv. Funct. Mater. 20, 399 (2010).

Daniel Schneidenbach, Sven Ammermann, Marc Debeaux, Andreas Freund, Mike Zöllner, Constantin Daniliuc, Peter G. Jones, Wolfgang Kowalsky and Hans-Hermann Johannes:
Efficient and Long-Time Stable Red Iridium(III) Complexes for Organic Light-Emitting Diodes Based on Quinoxaline Ligands Inorg. Chem., 2010, 49 (2), pp 397-406.

P. G. Jones, M. Debeaux, A. Weinkauf, H. Hopf, W. Kowalsky and H.-H. Johannes:
mer-Bis[3,5-difluoro-2-(2-pyridyl)phenyl-[kappa]2C1,N]{5-(2-pyridyl-[kappa]N)-3-[3-(4-vinylbenzyloxy)phenyl]-1,2,4-triazol-1-ido}iridium(III) methanol solvate
Acta Crystallographica Section E: Structure Reports Online 66 (1), pp. m66-m67




2009

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P. G. Jones, M. Debeaux, A. Weinkauf, H. Hopf, W. Kowalsky and H.-H. Johannes:
mer-Bis[3,5-difluoro-2-(2-pyridyl)phenylj2C1,N]{5-(2-pyridyl-jN)-3- [3-(4-vinylbenzyloxy)phenyl]-1,2,4-triazol-1-ido}-iridium(III) methanol solvate
Acta Crystallographica Section E Structure Reports,Online, ISSN 1600-5368, 2009

Marc Debeaux, Kai Brandhorst, Peter G. Jones, Henning Hopf, Jörg Grunenberg, Wolfgang Kowalsky and Hans-Hermann Johannes:
A stable enol from a 6-substituted benzanthrone and its unexpected behaviour under acidic conditions
Beilstein Journal of Organic Chemistry 2009, 5, No. 31.(2009).

M. Kroeger, S. Hamwi, J. Meyer, T. Riedl, W. Kowalsky, and A. Kahn:
Role of the deep-lying electronic states of MoO3 in the enhancement of hole-injection in organic thin films
Appl. Phys. Lett. 95, 123301 (2009).

H. Schmidt, H. Flügge, T. Winkler, T. Bülow, T. Riedl, and W. Kowalsky:
Efficient semi-transparent inverted organic solar cells with indium tin oxide top electrode
Appl. Phys. Lett. 94, 243302 (2009).
♦ unter den "Top 20 Most Downloaded Articles" in Juni 2009

S. Hamwi, J. Meyer, T. Winkler, T. Riedl, and W. Kowalsky:
P-type doping efficiency of MoO3 in organic hole transport materials
Appl. Phys. Lett. 94, 253307 (2009).

J. Meyer, D. Schneidenbach, T. Winkler, S. Hamwi, T. Weimann, P. Hinze, S. Ammermann, H.-H. Johannes, T. Riedl, and W. Kowalsky:
Reliable Thin Film Encapsulation for Organic Light Emitting Diodes grown by Low-Temperature Atomic Layer Deposition
Appl. Phys. Lett. 94, 233305 (2009).

T. Riedl, J. Meyer, T. Winkler, D. Schneidenbach, P. Görrn, H.-H. Johannes, W. Kowalsky:
Functional nanolaminate structures for organic optoelectronics (Invited)
9th International Conference on Atomic Layer Deposition, Monterey, USA, p. 121 (2009).

H. Schmidt, T. Winkler, M. Tilgner, H. Flügge, S. Schmale, T. Bülow, J. Meyer, T. Riedl, H.-H. Johannes, and W. Kowalsky:
Semi-transparent inverted organic solar cells
Proc. SPIE 7416, 741633 (2009).

P. Görrn, T. Riedl, and W. Kowalsky:
Encapsulation of Zinc Tin Oxide based Thin Film Transistors
J. Phys. Chem. C (doi: 10.1021/jp9018487).

D. Schneidenbach, J. Meyer, P. Görrn, S. Hamwi, T. Winkler, S. Ammermann, T. Riedl, H.-H. Johannes, and W. Kowalsky
Transparent OLED Displays: Technology Development (Invited)
Proceedings of the 29th International Display Research Conference, EURODISPLAY 2009, Rome, Italy, p.154-157 (2009).

T. Riedl, J. Meyer, T. Winkler, D. Schneidenbach, P. Görrn, H.-H. Johannes, W. Kowalsky:
Functional nanolaminate structures for organic optoelectronics (Invited)
9th International Conference on Atomic Layer Deposition, Monterey, USA, p. 121 (2009).

J. Meyer, D. Schneidenbach, P. Görrn, F. Bertram, T. Winkler, S. Hamwi, H.-H. Johannes, T. Riedl, W. Kowalsky, P. Hinze, and T. Weimann:
Highly-Efficient Gas Diffusion Barriers Based on Nanolaminates Prepared by Low-Temperature ALD
SID Digest of Technical Papers 40, 1706 (2009).

T. Riedl, P. Görrn, and W. Kowalsky: Transparent Electronics for See-Through AMOLED Displays
IEEE/OSA J. Displ. Technol. 5, 810 (2009)

M. Kröger, S. Hamwi, J. Meyer, T. Riedl, W. Kowalsky, and A. Kahn:
P-type doping of organic wide band gap materials by transition metal oxides: a case-study on Molybdenum trioxide
Org. Electron. (doi:10.1016/j.orgel.2009.05.007).

T. Rabe, P. Görrn, M. Lehnhardt, M. Tilgner, T. Riedl, and W. Kowalsky:
Highly sensitive determination of the polaron related optical absorption in organic charge transport materials
Phys. Rev. Lett. 102, 137401 (2009).

J. Meyer, P. Görrn, F. Bertram, S. Hamwi, T. Winkler, H.-H. Johannes, T. Weimann, P. Hinze, T. Riedl, and W. Kowalsky:
Al2O3/ZrO2 nanolaminates as ultra-high gas diffusion barriers - a strategy for reliable encapsulation of organic electronics
Adv. Mater. 21, 1845 (2009).

J. Meyer, S. Hamwi, S. Schmale, T. Winkler, H.-H. Johannes, T. Riedl, and W. Kowalsky:
A strategy towards p-type doping of organic materials with HOMO levels beyond 6 eV using tungsten oxide
J. Mater. Chem. 19, 702 (2009).

P. Görrn, F. Ghaffari, T. Riedl, and W. Kowalsky:
Zinc Tin Oxide Based Driver for Highly Transparent Active Matrix OLED Displays
Solid State Electron. 53, 329 (2009).




2008

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S. Ammermann, C. Daniliuc, P. Jones, W.-W. du Mont, W. Kowalsky and H.-H. Johannes:,, A unique six-membered chelated iridium complex" Dalton Transactions, 4095 4098, (2008).

M. Blumentritt, K. Melhorn, J. Flachsbarth, M. Kroener, W. Kowalsky, H.-H. Johannes:" A novel fabrication method of fiber-optical planar transmission sensors for monitoring pH in concrete structures". ELESIVER . ScienceDirect. Article in press (2008).

S. Ammermann, C. Daniliuc, P. G. Jones, W.-W. du Mont, H.-H. Johannes : Rac-(2R, 3S)-2-Phenyl-3-(3-phenyl-1,2,3,4-tettrahydroquinoxalin-2-yl)qui-noxaline. Acta Crystallographica Section E. Structure Reports online. ISSN 1600-5368. E64, o1205-o1206 (2008).

J. Meyer, P. Görrn, S. Hamwi, H.-H. Johannes, T. Riedl, and W. Kowalsky: Indium-free transparent Organic Light Emitting Diodes with Al doped ZnO electrodes grown by atomic layer and pulsed laser deposition, Appl. Phys. Lett. 93, 073308 (2008).

J. Meyer, T. Winkler, S. Hamwi, S. Schmale, H.-H. Johannes, T. Riedl, and W. Kowalsky:Transparent Inverted OLEDs with Tungsten Oxide Buffer LayerAdv. Mater. (early view).

M. Hoping, H. Gargouri, T. Riedl, M. Tilgner, H.-H. Johannes, and W. Kowalsky:Transition metal oxides as charge injecting layer for admittance spectroscopyAppl. Phys. Lett. 92, 213306 (2008).

T. Riedl, H.-H. Johannes, and W. Kowalsky:Transparente OLED Displaysin Jahrbuch 2008 Optik und Feinmechanik p.29-41 (2008).

M. Debeaux, S. Ammermann, H. Hopf, S. Janietz, W. Kowalsky, H. Krüger, M.Thesen, A. Wedel, U. J. Weinaug, H.-H. Johannes:Novel Styrene Functionalized Materials for Phosphorescent Polymers, 7th InternationalConference on Electroluminescent of Molecular Materials and RelatedPhenomena (ICEL-7), Dresden, 03.-06. September 2008.

M. Debeaux, S. Ammermann, H. Hopf, W. Kowalsky, H. Krüger, M. Thesen, A.Wedel, U. J. Weinaug, H.-H. Johannes:Novel Styrene Based Monomers for Application in PLEDs, 14th International Workshop on Inorganic and Organic Electroluminescence & 2008 International Conference on the Science and Technology of Emissive Displays and Lighting, Rom, 09.-12. September 2008.




2007

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M. Kröger, S. Hamwi, J. Meyer, T. Dobbertin, T. Riedl, W. Kowalsky and H.-H. Johannes:

"Temperature-independent field-induced charge seperation at doped organic/organic interfaces: Experimental modeling of electrical properties" Physical Review B 75, 235321, June 2007

T. Rabe, S. Hamwi, J. Meyer, P. Görrn, T. Riedl, H.-H. Johannes, and W. Kowalsky: "Suitability of lithium doped electron injection layers for organic semiconductor lasers," Applied Physics Letters 90, 151103, 2007

R. Caspary, A. Behrends, H. Shalibeik, M.M. Kozak, and W. Kowalsky: "Coherent optical frequency-domain reflectometry as characterisation tool for S-Band TDFAs" in 9th International Conference on Transparent Optical Networks, ICTON 2007, Rome, Italy, July 1-5, 2007




2006

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Blumentritt, M., Brodersen, O., Flachsbarth, J., Johannes, H.-H., Kröner, M., Melhorn, K., Sokoll, T., Jacob, A. F., Kowalsky, W., 2006: Novel Sensor Systems for Structural Health Monitoring. 3rd European Workshop on Structural Health Monitoring, accepted

Blumentritt, M., Flachsbarth, J., Kröner, M., Melhorn, K., Kowalsky, W., Johannes, H.-H., Brodersen, O., 2006: Optische chemoselektive Sensoren für die Bauwerksüberwachung. Tagung Bauchemie vom 5. - 6. Oktober 2006 in Karlsruhe, accepted.

Blumentritt, M., Flachsbarth, J., Kröner, M., Melhorn, K., Kowalsky, W., Johannes H.-H., Brodersen, O., 2006: Feuchtebestimmung in Bauwerken mit optischen Sensoren. Workshop Innovative Feuchtemessung in Forschung und Praxis 17. - 18. Oktober 2006 in Karlsruhe, accepted.

Beckmann, L.; Becker, E.; et.al.: Integration of organic electronics and polymer sensors. Konferrenz Technologies for Polymer Electronics - TPE 06

T. Rabe, K. Gerlach, T. Riedl, H.-H. Johannes, W. Kowalsky, J. Niederhofer, W. Gries, J. Wang, T.,Weimann, P. Hinze, B. Nehls, T. Farrell, U. Scherf: Quasi-cw operation of an organic thin-film DFB laser", 2006

T. Riedl, T. Rabe, H. H. Johannes, W. Kowalsky, J. Wang, T. Weimann, P. Hinze, B. S. Nehls, T. Farrell, and Ullrich Scherf: Tunable organic thin-film laser pumped by an inorganic violet diode laser. Appl. Phys. Lett. 88, 241116 (2006).

T. P. Baraniecki, W. Kowalsky, R. Caspary All-fiber red fiber laser in ring configuration Applied Physics B 83 (1), 2006, pp. 17-20

M. M. Kozak, W. Kowalsky, R. Caspary Low-loss glue splicing method to join silica and fluoride fibers Electronics Letters 41 (16), 2005, pp. 897-899

R. Sen, R. Caspary, W. Kowalsky Optimisation of melting and casting conditions for Zr-fluoride based glasses Optical Materials, 2006

S. Hartmann, A. Janssen, H.-H. Johannes, R. Caspary, W. Kowalsky, H. Schwab, D. Bertram, H. Blei, N. Meyer, B. Marheineke, M. Heuken Stable deposition of organic materials for Ir-based red OLEDs using organic vapor phase deposition SID Conference 2006, San Francisco, USA, (4.-9. Juli 2006)

R. Caspary, M. M. Kozak, W. Kowalsky Avalanche pumping of thulium doped S-band fiber amplifiers We.A1.2 , 8th International Conference on Transparent Optical Networks, Nottingham, UK (18.-22. Juli 2006)

D. Schneider, U. Lemmer, W. Kowalsky, and T. Riedl:
Low threshold organic semiconductor lasers in "Organic Light-Emitting Devices", Edited by K. Müllen and U. Scherf, Wiley-VCH (Weinheim), p. 369-395 (2006).

Patrick Görrn, Michelle Sander, Jens Meyer, Michael Kröger, Eike Becker, Hans-Hermann Johannes, Wolfgang Kowalsky, and Thomas Riedl:
Towards See-Through Displays: Fully Transparent Thin-Film Transistors Driving Transparent Organic Light Emitting Diodes
Adv. Mater. 18, 738 (2006).




2005

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T. Spehr, A. Siebert, T. Fuhrmann-Lieker, J. Salbeck T. Rabe, T. Riedl, H. H. Johannes, W. Kowalsky J. Wang, T. Weimann, P. Hinze: Organic solid-state ultraviolet-laser based on spiro-terphenyl Appl. Phys. Lett. 87, 161103 (2005)

J. Flachsbarth, M. Blumentritt, M. Kröner, W. Kowalsky, H.-H. Johannes: A new Fiber-Optical Transmission Sensor with Sensitive Zone Created by Laser Cutting. Structural Health Monitoring 2005. Proceedings of the 5th international Workshop on Structural Health Monitoring, Stanford University, CA September 12-14,2005.

Torsten Rabe, Matthias Hoping, Daniel Schneider, Eike Becker, Hans-Hermann Johannes, Wolfgang Kowalsky, Thomas Weimann, Jing Wang, Peter Hinze, Benjamin S. Nehls, Ullrich Scherf, Tony Farell, and Thomas Riedl: Threshold Reduction in Polymer Lasers Based on Poly (9,9-dioctylfluorene) with Statistical Binaphtyl Units. Advanced Functional Materials, 15, 1188-1192, 2005.

R. Parashkov, E. Becker, T. Riedl, H.-H. Johannes, W. Kowalsky: Microcontact Printing as a Versatile Tool for Pattering Organic Field-Effect Transistors. Advanced Materials. Vol. 17 No. 12. Juni 2005, 1453 - 1459.

M. M. Kozak, D. Goebel, R. Caspary and W.Kowalsky Spectroscopic Properties of Thulium Doped Zirconium Fluoride and Indium Fluoride Glasses, Journal of Non-Crystalline Solids 351, 2005, pp. 2009-2021.

M. M. Kozak, D. Goebel, W. Kowalsky and R. Caspary Excited State Absorption Spectroscopy for Thulium-Doped Zirconium Fluoride Fiber Optics Communications 259 (1), 2005, pp. 154-157.

M. M. Kozak, R. Caspary, W. Kowalsky, Thulium-dotierte Faserverstärker: Spektroskopie, Simulation und Messung, Diskussionssitzung: Messung und Modellierung in der Optischen Nachrichtentechnik, MMONT 2005, Hamburg-Blankenese

C. Himcinschia, S. Hartmannb, A. Janssenb, N. Meyerc, M. Friedricha, W. Kowalskyb, D.R.T. Zahna, M. Heukenc : Thin organic heterostructures deposited via organic vapor phase deposition: spectroscopic ellipsometry characterization. Journal of Crystal Growth 275 (2005), 1035-1040.

Torsten Rabe, Matthias Hoping, Daniel Schneider, Eike Becker, Hans-Hermann Johannes, Wolfgang Kowalsky, Thomas Weimann, Jing Wang, Peter Hinze, Benjamin S. Nehls, Ullrich Scherf,Tony Farrell, and Thomas Riedl:
Threshold reduction in polymer lasers based on poly(9,9-dioctylfluorene) with statistical binaphthyl units, Adv. Funct. Mater. 2005, 15, 1188 - 1192.

D. Schneider, T. Rabe, T. Riedl, T. Dobbertin, M. Kröger, E. Becker, H.-H. Johannes, W. Kowalsky, T. Weimann, J. Wang, P. Hinze, A. Gerhard, P. Stössel, H. Vestweber: An Ultraviolet Organic Thin-Film Solid-State Laser for Biomarker Applications, Adv. Mater. 17, 31 - 34 (2005).

C. Himcinschi, N. Meyer, S. Hartmann, M. Gersdorff, M. Friedrich, H.-H. Johannes, W. Kowalsky, M. Schwambera, G. Strauch, M. Heuken, D.R.T. Zahn: Spectroscopic ellipsometric characterization of organic films obtained via organic vapor phase deposition. Appl. Phys. A 80. 551-555 (2005).




2004

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R. Caspary, M. M. Kozak, and W. Kowalsky Fluoride Glass Fiber Amplifiers for the S-Band Eingeladener Vortrag FBR 2.2, 7th International Conference on Optoelectronics, Fiber Optics and Photonics, Cochin, India (9.-11. Dezember 2004)

R. Caspary, W. Kowalsky Stationäres Simulationsmodell für Thulium-dotierte Faserverstärker, Workshop der ITG-Fachgruppe 5.3.1, München (13.-14. Mai 2004)

R. Caspary Faserverstärker und Faserlaser Eingeladener Vortrag, 105. Tagung der DGaO, Bad Kreuznach, (1.-5. Juni 2004), 60

R. Caspary, M. M. Kozak, and W. Kowalsky Fluoride Glass Fiber Amplifiers for the S-Band Eingeladener Vortrag FBR 2.2, 7th International Conference on Optoelectronics, Fiber Optics and Photonics, Cochin, India (9.-11. Dezember 2004)

C. Himcinschi, M. Friedrich, D. Zahn, M. Gersdorff, N. Meyer, M. Schwambera, G. Strauch, M. Heuken, S. Hartmann, H.-H. Johannes, W. Kowalsky: Spectroscopic ellipsometric characterisazion of organic films obtained via organic vapor phase deposition.Chemnitz, Aachen, Braunschweig 2004.

C. Himcinschi, M. Friedrich, D. Zahn, S. Hartmann, A. Jannsen, W. Kowalsky, N. Meyer: Thin organic heterostructures deposited via Organic Vapor Deposition: spectroscopic ellipsometry characterisation.Proceedings of ICCG 14/ICVGE 12. Version Date 29.04.2004.

C.Meiners, J.Psilopoulos, A.F.Jacob: Determining the Scattered Field of Dense Particles Using Recursive Algorithms, Microwave Opt. Technol. Letters 40 (März 2004), S. 523-529

T.P. Baraniecki, R. Caspary, W. Kowalsky:"Blue, Green, Red Fiber Lasers Based on Pr/Yb Fluoride Fibers" 6th International Conference on Transparent Optical Networks Wroclaw (Poland), We.P.12

M. Kozak, R. Caspary, W. Kowalsky:"Thulium-doped Fiber Amplifier for the S-Band", 6th International Conference on Transparent Optical Networks Wroclaw (Poland) We.B1.6

R. Caspary, W. Kowalsky: Energy Level Calculations for Rare-Earth Doped Fluoride Glasses", 6th International Conference on Transparent Optical Networks Wroclaw (Poland) We.B1.5, invited talk

R. Parashkov, E. Becker, G. Ginev, T. Riedl, H.-H. Johannes, W. Kowalsky : All-organic thin-film transistors made of poly(3-butylthiophene) semiconducting and various polymeric insulation layers.J. Appl. Phys., 2004, 95, 1594-1596

H.-H. Johannes, E. Becker, R. Parashkov, W. Kowalsky: Elektrochemische Polymerisation zur Strukturierung von leitfähigen Polymeren.Bunsenkolloquium Golm, März 2004

Pavel Makedonski, Marc Brandes, Walter Grahn, Wolfgang Kowalsky, Jürgen Wichern, Stefan Wiese, Hans-Hermann Johannes: Synthesis of new kinds of reactive azo dyes and their application for fibre-optical pH-measurements.

S. Hartmann, A. Janssen, H. Krautwald, H.-H. Johannes, W. Kowalsky:: OVDP - an Alternative Process for OLED Production.Displays and Vakuum Electronics 183 ITG Fachtagungsbericht, 2004, 235-237

S. Hartmann, A. Janssen, M. Gersdorff, N. Meyer, M. Reinhold, M. Schwambera, G. Strauch, B. Marheineke, M. Heuken, H.-H. Johannes, W. Kowalsky, C. Himcinschi, D. Zahn:First Hybrid OLED by Organic Vapor Phase Deposition and its Advantages in Deposition Rate Control for OLED Manufacturing. SID International Symposium, 2004,Seattle, WA, U.S.A. May 23-28, 2004

R. Parashkov, E. Becker, G. Ginev, T. Riedl, H.-H. Johannes, W. Kowalsky: Microcontact printing as a versatile tool for pattering organic field-effect transistors.Appl. Phys. Lett., 2004.

Daniel Schneider, Torsten Rabe, Thomas Riedl, Thomas Dobbertin, Michael Kröger, Eike Becker, Hans-Hermann Johannes, Wolfgang Kowalsky, T. Weimann, J. Wang, P. Hinze: Laser threshold reduction by using Spiro-DPVBi a dopant in an all spiro guest-host system.Appl. Phys. Lett., 2004.

D. Schneider, T. Rabe, T. Riedl, T. Dobbertin, M. Kröger, E. Becker, H.-H. Johannes, W. Kowalsky, T. Weimann, J. Wang, P. Hinze: Ultra wide tuning range in DCM2-doped organic solid state lasers. Appl. Phys. Lett. 2004.

D. Schneider, T. Rabe, T. Riedl, T. Dobbertin, M. Kröger, E. Becker, H.-H. Johannes, W. Kowalsky, T. Weimann, J. Wang, P. Hinze, A. Gerhard, P. Stössel, H. Vestweber: Ultraviolet organic thin-film solid-state laser for bio-marker applications,.Adv. Mat. 2004

D. Schneider, T. Rabe, T. Riedl, T. Dobbertin, O. Werner, M. Kröger, E. Becker, H.-H. Johannes, W. Kowalsky, T. Weimann, J. Wang, P. Hinze, A. Gerhard, P. Stössel, H. Vestweber: Deep Blue widely-tunable organic solid-state laser based on a spirobifluorene derivative in press. Appl Phys. Lett., 2004

G. Ginev, T. Riedl, R. Parashkov, H-H. Johannes and W. Kowalsky: Organic-GaAs heterostructure diodes for microwave applications. Appl. Surf. Sci. 2004.

Reufer et al.: Low-threshold polymetric distributed feedback lasers with metallic contacts .Applied Physics Letters , Vol. 84, No 17, 26 April 2004.

T. Dobbertin, M. Kröger, D. Schneider, E. Becker, H.-H. Johannes, Wolfgang Kowalsky: Inverted topside-emitting organic-light emitting diodes for active-matrix displays. SPIE Europe, Strasbourg, France..

T. Dobbertin et al..: Inverted topside-emitting organic light-emitting diodes. Proc. SPIE Int. Opt. Eng. 5214, 150 (2004).

D. Schneider et al.: Laser threshold analysis of first- and second - order organic solid state distributed feedback laser. Proc. SPIE Int. Soc. Opt. Eng. 5214, 310 (2004). PDF (147kB) GZipped PS. Order.

S. Hartmann, A. Janssen, H. Krautwald, H.-H. Johannes, W. Kowalsky: OVDP - an Alternative Process for OLED Production.Displays and Vakuum Electronics 183 ITG Fachtagungsbericht (2004) 235-237.

S. Hartmann, A. Janssen, M. Gersdorff, N. Meyer, M. Reinhold, M. Schwambera, G. Strauch, B. Marheineke, M. Heuken, H.-H. Johannes, W. Kowalsky, C. Himcinschi, D. Zahn: First Hybrid OLED by Organic Vapor Phase Deposition and its Advantages in Deposition Rate Control for OLED Manufacturing.
SID International Symposium 2004,Seattle, WA, U.S.A. May 23-28, 2004

C. Himcinschi, N. Meyer, S. Hartmann, M. Friedrich, G. Strauch, W. Kowalsky, M. Heuken, and D.R.T. Zahn:Spectroscopic ellipsometric characterization of organic films deposited via Organic Vapor Phase Deposition
Frühjahrstagung der Deutschen Physikalischen Gesellschaft vom 08.03. bis 12.03.2004 in Regensburg. Verhandlungen der Deutschen Physikalischen Gesellschaft, 2/2004, page 544.

R. Parashkov, E. Becker, G. Ginev, T. Riedl, H.-H. Johannes, W. Kowalsky: Microcontact printing as a versatile tool for pattering organic field-effect transistors. Applied Physics Letters (2004).

P. Makedonski, Marc Brandes, Walter Grahn, Wolfgang Kowalsky, Jürgen Wichern, Stefan Wiese, Hans-Hermann Johannes: Synthesis of new kinds of reactive azo dyes and their application for fibre-optical pH-measurements .Dyes and Pigments 61 (2004) 109-119.

R. Parashkov, E. Becker, G. Ginev, T. Riedl, H.-H. Johannes, W. Kowalsky: All-organic thin-film transistors made of poly(3-butylthiophene) semiconducting and various polymeric insulation layers.Journal of Applied Physics-February 1, 2004-Volume 95, Issue 3, pp. 1594-1596.

R. Parashkov, E. Becker, G. Ginev, T. Riedl, H.-H. Johannes, W. Kowalsky: Flexible All-Organic Field-Effect Transistors fabricated by Electronic-Peeling Transfer.Japanese Journal of Applied Physics, Volume 43,No 2A, pp. L 130-L132, 2004,The Japan Applied Physics.




2003

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T. Dobbertin, E. Becker, T. Benstem, G. Ginev, D. Heithecker, H.-H. Johannes, D. Metzdorf, H. Neuner, R. Parashkov, W. Kowalsky: OLED matrix displays: in-line process technology and fundamentals.Thin Solid Films 442, 132-139 (2003).

R. Caspary, T. Baraniecki, M. Kozak, W. Kowalsky Invited talk: Recent Progress on S-Band Fiber Amplifiers CREW-Workshop, PTB Braunschweig, Germany, April 10-11, 2003

Tomasz Baraniecki: R. Caspary, T. Baraniecki, M. Kozak, W. Kowalsky Invited talk: Recent Progress on S-Band Fiber Amplifiers CREW-Workshop, PTB Braunschweig, Germany, April 10-11, 2003

W. Grahn, H.-H. Johannes, U. Lawrentz, M. Kröner, A. Feldner, M. Welscher, Th. Fehn, M. Schwörer: Colorchem '98. Spindleruv Mlyn, Czech Republic, 17.-21.05.1998: Oligomeric Cyanines and Squaraines.

M. Brandes, P. Makedonski, M. Beckmann, M. Kröner, H.-H. Johannes, S. Wiese, W. Kowalsky: Neue Konzepte für faseroptische Chloridsensoren in der Bauwerksüberwachung.GESA-Symposium VDI-Berichte Nr. 1757 Braunschweig 2003, 167 - 174.

M. Brandes, P. Makedonski, M. Beckmann, M. Kröner, H.-H. Johannes, S. Wiese, W. Kowalsky:New Designs of fiber-optical Sensors in Structural Health Monitoring.4th Int. Workshop on Structural Health Monitoring, Stanford CA 2003

T. Dobbertin,O. Werner, J. Meyer, A. Kammoun, D. Schneider, T. Riedl, E. Becker, H.-H. Johannes, W. Kowalsky:Inverted hybrid organic light-emitting device with polyethylene dioxythiophene-polystyrene sulfonate as an buffer layerAppl. Phys. Lett. 83, Number 24 (2003).

E. Becker, R. Paraschkov, G. Ginev, D. Schneider, S. Hartmann, F. Brunetti, T. Dobbertin, D. Metzdorf,T. Riedl, H.-H. Johannes, W. Kowalsky:All-organic thin-film transistors patterned by means of selective electropolymerizationAppl. Phys. Lett. 83, Number 19 (2003).

Y. M. Manz, A. Christ, O. G. Schmidt, T. Riedl, and A. Hangleiter:Optical and structural ansotropy of InP/GaInP quantum dots for laser applicationsAppl. Phys. Lett. 83, 887 (2003).

D. Schneider, S. Hartmann, T. Dobbertin, T. Benstem, D. Metzdorf, E. Becker, A. Kammoun, C. Schildknecht, H. Krautwald, H. Johannes, T. Riedl, and W. Kowalsky:Laser threshold analysis of first and second order organic solid-state distributed feedback laserSPIE Annual Meeting, San Diego (USA) (2003).

T. Dobbertin, D. Schneider, D. Metzdorf, E. Becker, T. Riedl, A. Kammoun, C. Schildknecht, H. H. Johannes, and W. Kowalsky:Inverted topside-emitting organic light-emitting diodesSPIE Annual Meeting, San Diego (USA) (2003).

T. Riedl, F. Hitzel, A. Hangleiter, S. Miller, A. Weimar, G. Brüderl, A. Lell, and V. Härle:Revealing the Defect Structure in Laterally Overgrown GaN Stripes Utilizing Photoelectrochemical Etching TechniquesJpn. J. Appl. Phys. Vol. 42, 3381-3382 (2003).

Dirk Metzdorf, Eike Becker, Thomas Dobbertin, Soeren Hartmann, Dirk Heithecker, Hans-Hermann Johannes, Anis Kammoun, Henning Krautwald, Thomas Riedl, Christian Schildknecht, Daniel Schneider, and Wolfgang Kowalsky:OLED Matrix-DisplaysMat. Res. Soc. Symp. Proc. Vol. 769 H4.2.1 (2003).

R. Parashkov, E. Becker, S. Hartmann, G. Ginev, D. Schneider, H. Krautwald, T. Dobbertin, D. Metzdorf, F. Brunetti, C. Schildknecht, A. Kammoun, M. Brandes, T. Riedl, H.-H. Johannes, and W. Kowalsky:Vertical channel all-organic thin-film transistorsAppl. Phys. Lett. 82, 4579 (2003).

Dirk Heithecker, Anis Kammoun, Thomas Dobbertin, Thomas Riedl, Eike Becker, Dirk Metzdorf, Daniel Schneider, Hans-Hermann Johannes, and Wolfgang Kowalsky:Low-voltage organic electroluminescence device with an ultrathin, hybrid structure.Appl. Phys. Lett. 82, 4178 (2003).

E. Becker, T. Riedl, T. Dobbertin, D. Schneider, D. Heithecker, D. Metzdorf, H. H. Johannes, and W. Kowalsky:Spatially selective flash sublimation of small organic molecules for organic light-emitting diodes and display applications.Appl. Phys. Lett. 82, 2712 (2003).

R. Parashkov, E. Becker, H.H. Johannes, D. Schneider, G. Ginev, D. Metzdorf, T. Dobbertin, and W. Kowalsky:
"ALL-ORGANIC FIELD EFFECT TRANSISTORS"
Symposium Proceedings Vol. 769, Material Research Society 2003

W. Kowalsky, E. Becker, T. Dobbertin, H.-H. Johannes, D. Metzdorf, T. Riedl:
"OLED MATRIX-DISPLAYS"
Symposium Proceedings Vol. 769, Material Research Society 2003

T. Dobbertin, M. Kroeger, D. Heithecker, D. Schneider, D. Metzdorf, H. Neuner, E. Becker, H.-H. Johannes, W. Kowalsky:
Inverted top - emitting organic light-emitting diodes using sputter-deposited anodes
Applied Physics Letters,vol. 82, no. 2, January 2003




2002

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Kleine-Ostmann, P. Knobloch, R. Caspary, M. Hofmann and M. Koch Dual-wavelength Fibre Laser, Electronics Letters 38, 2002, p. 309

R. Caspary Laserdisplays: ein weiteres Einsatzgebiet für Faserlaser? Diskussionssitzung des ITG-FA 8.6, 07./08.03.2002

R. Caspary Laserdisplays: Technik und Perspektiven 7. EUROFORUM Jahrestagung "Displays 2002", 25./26.06.2002

M. Brandes, H.-H. Johannes, W. Kowalsky, P. Makedonski
J. Wichern, S. Wiese and W. Grahn
Fibreoptical in-situ evaluation of corrosion process in reinforced concrete
SHM 2002, Paris, Juli 2002

E. Becker, T. Dobbertin, T. Benstem, D. Heithecker
H.-H. Johannes, D. Metzdorf, H. Neuner, R. Parashkov
and W. Kowalsky
High-Resolution Patterning of Organic Thin Films for Device Applications
International Newsletter on Microsystems an MEMS (mstnews)
VDI/VDE Technologiezentrum Informationstechnik GmbH, Januar 2002.

T. Dobbertin, E. Becker, T. Benstem, H.-H. Johannes, D. Metzdorf
H. Neuner and W. Kowalsky
OLED-Displays: Von der Grundlagenforschung zum Produkt
Carolo-Wilhelmina Schwerpunktheft Materialwissenschaften, Forschungsmagazin der Technischen Universität Braunschweig
Januar 2002

T. Dobbertin, E. Becker, T. Benstem, H. H. Johannes, D. Metzdorf
H. Neuner und W. Kowalsky
Organic Electroluminesce Displays: From Fundamental Research to Final Product
Precision, Business and Technical News from Applied Films
2002, 6-9

T. Dobbertin, E. Becker, T. Benstem, H. H. Johannes, D. Metzdorf
H. Neuner und W. Kowalsky
Organische Displays: Technik und Markt
Fachverband Bauelemente der Elektronik im Zentralverband Elektrotechnik- und Elektronikindustrie, ZVEI, Mikroelektronik-Trendanalyse bis 2005, Wirtschaftliche und technische Aspekte, 2002

T. Dülcks, W. Grahn, H.- H. Johannes, U. Lawrentz, M. Ritter, H.- M. Schiebel, P. Schulz
Mass Spectrometry of Oligomeric Cyanines and Squaraines of the Indole Series: Fast Atom Bombardment-Induced Chemical Reaktions
Z. Naturforsch. 2002, 57b, 393-398




2001

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M. M. Kozak, R. Caspary, U. B. Unrau Computer Aided EDFA Design, Simulation and Optimization 3rd International Conference on Transparent Optical Networks, Cracow, Poland (18-21. Juni 2001)

M. Reufer, S. Riechel, J. Crewett, U. Lemmer, J. Feldmann
T. Benstem, W. Kowalsky
Organic Laser Structures with Metallic Contacts
Poster, European Conference on Organic Electronics and Related Phenomena 2001

T. Dobbertin, E. Becker, T. Benstem, H. H. Johannes, D. Metzdorf
H. Neuner und W.Kowalsky
Organische Displays - Technik und Markt
Fachverband Bauelemente der Elektronik im Zentralverband Elektrotechnik- und Elektronikindustrie (ZVEI), Mikroelektronik - Trendanalyse bis 2005, Wirtschaftliche und technische Aspkete

M. Reufer, S. Riechel, J. Crewett, U. Lemmer, J. Feldmann
T. Benstem and W. Kowalsky
Organic Laser Structures with Metallic Contacts
Poster, Photonik-Symposium der Volkswagenstiftung , Wien
September 2001

J. Wichern, P. Makedonski, W. Grahn, S. Wiese and W. Kowalsky
Fiberoptical Sensors for an In-Situ Monitoring of Moisture and pH-Value in Reinforced Concrete
Proceeding of the 3rd International Workshop on Struktural Health Monitoring, Stanford University, CA, September 12-14 2001

E. Becker, H.-H. Johannes, T. Benstem, T. Dobbertin, D. Heithecker
D. Metzdorf, H. Neuner and W. Kowalsky
A New Structuring Technique for Polymer Integrated Circuits
Polytronics 2001, First International IEEE Conference on Polymers and Adhesives in Microelectronics and Photonics, Potsdam
95-97, 21.-24.10. 2001

W. Kowalsky, E. Becker, T. Benstem, T. Dobbertin, H.-H. Johannes
D. Metzdorf and H. Neuner
OLED Matrix Displays: Technology and Fundamentals (Keynote Speaker)
Polytronics 2001, Proc. of First International IEEE Conference on Polymers and Adhesives in Microelectronics and Photonics, Potsdam, 20-28, 21.-24.10.2001

H.-H. Johannes, E. Becker, T.Dobbertin, D. Heithecker, T. Benstem
D. Metzdorf, H. Neuner und W. Kowalsky
Organische Elektrolumineszenz
Svarowski-Workshop, Wattens bei Insbruck, 19.07.2001

T. Dobbertin, E. Becker, T. Benstem, H.-H. Johannes, D. Metzdorf
H. Neuner and W. Kowalsky
Organische Elektrolumineszenz-Displays: Von der Grundlagenforschung zum Endprodukt
6. Euroforum-Jahrestagung: Display 2001, Stuttgart 26.-27.06. 2001

S. Wiese, W. Kowalsky, W. Grahn and J. Wichern
Fiberoptical sensors for monitoring chemical attacks on concrete structures
Proc. Micro Systems Technologies, VDE Verlag, Düsseldorf, 279-301, 2001

J. Schöbel, E. Becker, T. Benstem, H.-H. Johannes, D. Metzdorf
H. Neuner, and W. Kowalsky
OLED matrix displays: fabrication and characterization
Proc. of Display and Vacuum Electronics, ITG-Fachbericht 165
VDE-Verlag Berlin, Garmisch-Partenkirchen,37-42, 2.-3.05.2001

W. Kowalsky
OMBD Growth of Organic LEDs (eingel. Vortrag)
Euro-MBE Workshop, Hinterzarten, Februar 2001




2000

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S. Wiese, J. Wichern, W. Kowalsky and W. Grahn
Fiberotical Sensors in Concrete
Proc. XVI IMEKO World Congress IMEKO 2000, Vol. VII, Wien
2000, 259-264

T. Benstem, H.-H. Johannes, D. Metzdorf, H. Neuner, D. Schneider
J. Schöbel and W. Kowalsky
Dynamische Untersuchungen an organischen Leuchtdioden
Poster, Photonik-Symposium der Volkswagenstiftung, Duisburg
Oktober, 2000

M. Stößel, J. Staudigel, F. Steuber, J. Blässing, J. Simmerer
A. Winnacker, H. Neuner, D. Metzdorf, H.-H. Johannes
and W. Kowalsky
Electron injection and transport in 8-hydroxyquinoline aluminium
Synth. Met., Vol. 111-112, No. 0, 2000, 19-24

A. Feldner, D. Scherer, M. Welscher, Th. Vogtmann, M. Schwörer
U. Lawrentz, Th. Laue, H.-H. Johannes and W. Grahn
Nonlinear Optical Properties of Specific Polymethines: Influence of Substituents and Chain Length
Nonlinear Optics 2000, 26, 99-106

W. Kowalsky, E. Becker, T. Benstem, H.-H. Johannes, D. Metzdorf
H. Neuner und J. Schöbel
Characterization and Optimization of OLED Materials and Layer Sequences
SPIE Int. Symp. on Optical Science and Technologie (Proc. of SPIE Vol. 4105, Organic Light-Emitting Materials and Devices IV)
San Diego, USA, 2000, 194-202

W. Kowalsky, E. Becker, T. Benstem, H.-H. Johannes, D. Metzdorf
H. Neuner, und J. Schöbel
Organic semiconductors: fundamentals and applications
Advances in Solid State Physic. 2000, 40, 795-808

W. Kowalsky
Organische Elektrolumineszenz-Displays
5. Euroforum-Jahrestagung, Display 2000, Stuttgart, 27.-28. Juni 2000

E. Becker, T. Benstem, H.-H. Johannes, D. Metzdorf, H. Neuner
J. Schöbel und W. Kowalsky
Organische Elektrolumineszenz: Neue Technologie für flache Bildschirme
FKT, Fachzeitschrift der Fernseh- und Kinotechnischen Gesellschaft 2000, 54. Jahrgang, 8-9, 532-537

S. Riechel, U. Lemmer, J. Feldmann, T. Benstem, W. Kowalsky
U. Scherf, A.Gombert and V. Wittwer
Laser modes in organic solid-state distributed feedback lasersAppl. Phys. B 71, 2000, 897-900

M. Stößel, J. Staudigel, F. Steuber, J. Blässing, J. Simmerer
Winnacker, H. Neuner, D. Metzdorf, H.-H. Johannes
and W. Kowalsky
Electron injection and transport in 8-hydroxyquinoline aluminium
Synth. Met. 2000, 111-112 (0), 19-24




1999

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A. Hübener and W. Kowalsky
Tl-haltige III-V-Verbindungshalbleiter
Poster, Photonik-Symposium der Volkswagen-Stiftung, Duisburg
September 1999

W. Grahn, J. Wichern, S. Wiese, W. Kowalsky, A. Glümer
B. Skeries and K. Buchholz
Faseroptische Sensoren zur Bestimmung des Feuchtgehaltes von Beton
Bauchemie von der Forschung zur Praxis, GDCh-Monographie
Bd. 15, 1999, 107-111

S. Wiese, W. Kowalsky, B. Jannsen, A. Jacob, J. Wichern, W. Grahn
K. Hariri and H. Budelmann
Innovative Sensors for the Assessment of Durability and Load-Capacity of Concrete Structures
Life Prediction and Aging Management of Concrete Structures, Proc. 8th Int. Expertcentrum Conf. held by RILEM Techn. Commitee 160-MLN, Bratislava, Slovakia, 1999, 94-103

Kowalsky, W., Benstem, T., Böhler, A., Dirr, S., Johannes, H.-H., Metzdorf, D., Neuner, H., Schöbel, J.
Organic Electroluminescent Devices
Advances in Solid State Physics 39, Meeting Arbeitskreis Festkörperphysik 1999 in Münster, 91-100

Hübener, A., Schöbel, J., Mallwitz, A., Kowalsky, W.
1.3 µm Emission of TIGaP-LEDs Grown on GaAs
11. Intern. Conference on Indium Phosphide and Related Materials (IPRM'99), 16.-20. May 1999, Davos, 8-9

S. Wiese, W. Kowalsky, J. Wichern and W. Grahn
Fiberoptical Sensors for On-Line Monitoring in Concrete Structures
Proc. 2nd Int. Workshop on Structural Health Monitoring, Stanford University, CA, 1999, 643-650

W. Kowalsky
Organische Elektrolumineszenz-Displays
4. Euroforum-Jahrestagung, Display 1999, Stuttgart, 6.-7. Juli 1999

S. Wiese, W. Kowalsky, J. Wichern and W. Grahn
Neuartige faseroptische Sensoren zur zerstörungsfreien Langzeitüberwachung von Betonbauwerken
Feuchtetag '99: Umwelt - Messverfahren - Anwendungen, DGZfP-Berichtsband BB 69-CD, Vortrag M4, BAM Berlin-Lichterfelde, 1999

W. Kowalsky, T. Benstem, A. Böhler, H.-H. Johannes, D. Metzdorf
H. Neuner and J. Schöbel
Electroluminescence from Organic Thin Film Multilayers
9th Int. Conf. on Unconventional Photoactive Systems (UPS´99)
Würzburg, 1999, 103-104

W. Kowalsky, T. Benstem, A. Böhler, S. Dirr, H.-H. Johannes
D. Metzdorf, H. Neuner and J. Schöbel
Organic Electroluminescent Devices
Advances in Solid State Physic. 1999, 39, 91-100

Wolfgang Kowalsky, Torsten Benstem, Achim Böhler, Siegfried Dirr
Hans-Hermann Johannes, Dirk Metzdorf, Helge Neuner, Jörg Schöbel and Peter Urbach
Organic molecular beam deposition: technology and applications in electronics and photonics
Phys. Chem. Chem. Phys. 1999, 1, 1719-1725

Wolfgang Kowalsky, Torsten Benstem, Achim Böhler, Siegfried Dirr
Hans-Hermann Johannes, Dirk Metzdorf, Helge Neuner and Jörg Schöbel
Improved Lifetime and Efficiency of Organic Light Emitting Diodes for Applications in Displays
SPIE Conference on Light-Emitting Diodes: Research, Manufacturing and Applications III, San Jose, CA, USA, 1999, SPIE
Vol. 3621, 103-114




1998

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R. Caspary, U.B. Unrau Universelles Simulationsmodell für Dauerstrich-Faserlaser ITG-Tagung Messung und Modellierung in der Optischen Nachrichtentechnik MMONT'98, Günzburg (4-6. März 1998), 23

R. Caspary, U. B. UnrauSpectroscopy of holmium-doped halide glass In: D. Hewak (ed,): Glass and Rare-Earth Doped Glasses for Optical Fibres IEE EMIS Datarareviews series, Vol. 22, Ch. C3.3, IEE, INSPEC, (1998), pp. 224-237.

W. Kowalsky, H.-H. Johannes, T. Benstem, A. Böhler, S. Dirr
D. Metzdorf, H. Neuner and J. Schöbel
Organische Elektrolumineszenz
Photonik-Symposium der Volkswagen-Stiftung, 14.-16.10. 1998
Seeheim-Jugenheim

A. Feldner, M. Welscher, Th. Fehn, Th. Vogtmann, M. Schwörer
H.-H. Johannes and W. Grahn
Nichtlinear optische Eigenschaften ausgewählter Polymethine: Einfluß von Substituenten und Kettenlänge
International Bunsen Discussion Meeting, Poster P 4-2
27.-30.09.1998 Heidelberg

T. Benstem, S. Dirr, A. Böhler, H.-H. Johannes and W. Kowalsky
Europium-Chelate Based Microcavity OLEDs with a Guest-Host Emission Layer
Extended Abstracts of the Inorganic and Organic Electroluminescence, 9th International Workshop, 4th Int. Conf.on Sci and Techn. of Display Phosphors, Bend, OR, USA, 1998, 95-98

D. Metzdorf, A. Böhler, S. Dirr, H.-H. Johannes, H. Neuner
J. Schöbel and W. Kowalsky
Improved Lifetime and Efficiency of Organic Light Emitting Devices Using a New Fabrication Technique
Extended Abstracts of the Inorganic and Organic Electroluminescence, 9th International Workshop, 4th Int. Conf.on Sci and Techn. of Display Phosphors, Bend, OR, USA, 1998, 91-94

A. Böhler, P. Urbach, J. Schöbel, S. Dirr, H.-H. Johannes
D. Ammermann and W. Kowalsky
Organic heterostructures for electronic and photonic devices
Physica E 2 1998, 562-572

Böhler, A., Urbach, P., Ammermann, D., Kowalsky, W.
Organic molecular beam deposition: technology and applications in electronics and photonics
Conference on Low Dimensional Structures and Devices (LDSD) '97, Materials Science & Engineering B51, 1998, pp. 58-65

W. Grahn, H.-H. Johannes, U. Lawrentz, M. Kröner, A. Feldner
M. Welscher, Th. Fehn and M. Schwörer
Oligomeric Cyanines und Squaraines
Colorchem '98, Spindleruv Mlyn, Czech Republic 17.-21.05 1998

J. Schöbel, A. Böhler, S. Dirr, H.-H. Johannes, A. Rückmann
P. Urbach, S. Wiese and W. Kowalsky
Organic Electroluminescence
Display and Vacuum Electronics: contributions of ITG conference
ITG-Fachbericht 150, VDE-Verlag Berlin, 1998, 99-104

W. Werncke, M. Pfeiffer, A. Lau, W. Grahn, H.-H. Johannes
and L. Dähne
Alternation and saturation effects in the dependence of the third-order hyperpolarizabilities of cyanines
J. Opt. Soc. Am. B, 1998, Vol 15 (No. 2), 863-870

A. Feldner, Th. Fehn, Th. Vogtmann, M. Schwörer, H.-H. Johannes and W. Grahn
Nichtlinear optische Eigenschaften ausgewählter Polymethine: Einfluß von Substituenten und Kettenlänge
Frühjahrstagung der Deutschen Physikalischen Gesellschaft 1998
Poster CP5.5, Bayreuth

S. Dirr, S. Wiese, H.-H. Johannes and W. Kowalsky
Organic Electro- and Photoluminescent Microcavity Devices
Adv. Mat. 1998, 10 (2), 167-171

Dirr, S., Böhler, A., Wiese, S., Johannes, H.-H., Kowalsky, W.
Organic Electro- and Photoluminescent Microcavity Devices
Jpn. J. Appl. Phys. 37, 1998, pp. 1457-1461




1997

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Schöbel, J., Ammermann, D., Böhler, A., Dirr, S, Kowalsky, W.
Carrier Transport, Recom-bination, and Exciton Diffusion in Organic Light-Emitting Diodes Studied by a Dye-Doping Technique
1997 SID International Symposium (Boston, MA), Digest of Technical Papers, Society for Information Display SID, Santa Ana, CA, USA, 1997, pp. 782-785

W. Werncke, M. Pfeiffer, T. Johr, A. Lau, W. Grahn, H.-H. Johannes and L. Dähne
Increase and saturation of the third-order hyperpolarizabilities in homologous series of symmetric cyanines
Chemical Physics, 1997, 216, 337-347

H.-H. Johannes, W. Grahn, I. Dix and P. G. Jones
5-Iodo-2-[iodo(5-iodo-1,3,3-trimethyl-2-indolinylidene)methyl]-1,3,3-trimethyl-3H-indolium Perchlorate: a Highly Overcrowded Cyanine Dye
Acta Cryst. 1997, C53, 1432-1434

H.-H. Johannes, W. Grahn, I. Dix and P. G. Jones
1,3,3-Trimethyl-5-styryl-2-[(1,3,3-trimethyl-5-styryl-2-indolinylidene)methyl]-3H-indolium Picrate: an Extended Trichromophoric System
Acta Cryst. 1997, C53, 1363-1366

W. Kowalsky, A. Böhler, P. Urbach, J. Schöbel, S. Dirr
H.-H. Johannes and D. Ammermann
Organic Heterostructures for Electronic and Photonic Devices
Proceedings of the Conference on Modulated Semiconductor Structures 8, Santa Barbara, CA, USA, 14.-18.07. 1997, I TH17

Schöbel, J., Urbach, P., Felbier, F., Kowalsky, W.
Frequency Conversion with Organic-on-Inorganic Heterostructure Diodes
Extended Abstracts of the 1997 International Conference on Solid-State Devices and Materials (SSDM '97), Hamamatsu, Japan, 1997, pp. 260-261

Dirr, S. Wiese, H.-H. Johannes, D. Ammermann, A. Böhler
and W. Kowalsky
Photoluminescence Enhancement in Organic Microcavity Structures
Macromol. Symp. 1997, 125, 69-76, Verlag Hüthig & Wepf, Zürich

Dirr, S., Wiese, S., Johannes, H.-H., Ammermann, D., Böhler, A., Grahn, W., Kowalsky, W.
Luminescence Enhancement in Microcavity Organic Multilayer Structures
Proc. of the International Conference on Electroluminescence '97, Kitakyushu, Japan, 1997 p. 53-56

S. Dirr, H.-H. Johannes, S. Wiese, D. Ammermann, A. Böhler
W. Grahn and W. Kowalsky
Nearly monochromatic light emitting diodes based on organic thin films
ACS/OSA Symposium on Organic Materials and Devices in Display Technology, San Francisco, CA, USA, 1997

W. Grahn, H.-H. Johannes, U. Lawrentz and H. Nerenz
Polymethine als NLO-phore
Photonik-Symposium der Volkswagen-Stiftung, 08.-10.10. 1997
Würzburg

W. Grahn, H.-H. Johannes and U. Lawrentz
Oligomere Cyaninen und Quadraine
3. Fachtagung über Iminiumsalze, Stimpfach-Rechenberg bei Aalen, 17.09.-19.09.1997

S. Dirr, S. Wiese, H.-H. Johannes, D. Ammermann, A. Böhler
W. Grahn and W. Kowalsky
Microcavity effects in organic multilayer structures
Proc. Bayreuth Polymer & Material Research Symposium, Bayreuth
1997

S. Dirr, S. Wiese, H.-H. Johannes, D. Ammermann, A. Böhler
W. Grahn and W. Kowalsky
Luminenscence Enhancement in Microcavity Organic Multilayer Structures
Synth. Met. 1997, 91 (1-3), 53-56

A. Böhler, S. Dirr, H.-H. Johannes, D. Ammermann and W. Kowalsky
Influence of the Process Vacuum on the Device Performance of Organic Light Emitting Diodes
Synth. Met. 1997, 91 (1-3), 95-97

Kowalsky, W., Ammermann, D, Böhler, A., Urbach, P., Dirr, S., Schöbel, J.
Organic molecular beam deposition: technology and applications in electronics and photonics
Conference on Low Dimensional Structures and Devices (LDSD) '97, Lisbon, Portugal, 1997

Grahn, W., Jacob, A.F., Kowalsky, W.
Sensoren für die Bauwerksüberwachung
Workshop Bauchemie, GDCh-Arbeitsgemeinschaft Bauchemie, Hünfeld (Nov. 1996), GDCh-Monographie, Vol. 7 (ISBN 3-924763-62-3), 1997, pp. 145-149

W. Grahn, H.-H. Johannes and U. Lawrentz
Oligomere Cyaninen und Quadraine
2. Workshop über konjugierte Polymere und Oligomere, Blaubeuren bei Ulm, 02.-06.07.1997

W. Grahn, H.-H. Johannes, T. Laue and U. Lawrentz
Approaches to oligomers of polymethines and pseudo-Ladder Polymers: Novel Materials for Cubic Nonlinear Applications
Worshop on Nonlinear-Optical Properties of Polymers and Related Topics, Universität Bayreuth, 30.06.-01.07.1997

P. Urbach, S. Dirr, H.-H. Johannes, S. Wiese and W. Kowalsky
Microcavity Device Structures and Lanthanide Complexes for Narrow Bandwidth Light Emitting Diodes
Extended Abstracts, of the of the International Conference on Solid State Devices and Materials (SSDM '97), Hamamatsu, Japan, 1997
418-419

S. Dirr, H.-H. Johannes, J. Schöbel, D. Ammermann, A. Böhler
W. Grahn and W. Kowalsky
Vacuum deposited thin films of lanthanide complexes: spectral properties and application in organic light emitting diodes
1997 SID International Symposium (Boston, MA), Digest of Technical Papers, Society for Information Display (SID), Santa Ana
CA, USA, May 1997, 778-781

W. Werncke, M. Pfeiffer, A. Lau, W. Grahn and H.-H. Johannes
Third-order hyperpolarizabilities of homologous series of meso-nitrogen substituted thiacyanines
Chem. Phys. Lett., 1997, 226, 99-106

Böhler, A., Dirr, S., Ammermann, D., Johannes, H.-H., Grahn, W., Kowalsky, W.
Influence of the Process Vacuum on the Device Performance of Organic Light Emitting Diodes
Proc. of the International Conference on Electroluminescence '97, Kitakyushu, Japan, 1997, p. 95-97

Ammermann, D., Böhler, A., Kowalsky, W.
Pospects of organic electroluminescent flat-panel displays based on multilayer molecular thin films
Laser und Optoelektronik 29, No. 3, 1997, pp. 59-65
Synth. Met. 91, 1-3, 1997, pp. 95-97

Ammermann, D., Böhler, A., Dirr, S., Kowalsky, W.
Device structures and materials for organic light emitting diodes
Proc. SPIE 3006, 1997




1996

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Urbach, P., Ammermann, D., Kowalsky, W.
Organic-on-InP heterostructure diodes for microwave applications
Proc. International Conference on Solid State Devices and Materials SSDM '96, Yokohama, Japan, 1996, pp. 586-588

Ammermann, D., Böhler, A., Dirr, S., Kowalsky, W.
Multilayer organic light emitting diodes for efficient carrier injection and confinement
Proc. International Conference on Solid State Devices and Materials, SSDM '96, Yokohama, Japan, 1996, pp. 658-660

A. Ammermann, A. Böhler, S. Dirr, H.-H. Johannes
and W. Kowalsky
Multilayer Organic Light Emitting Diodes for Flat Panel Displays
AEÜ Int. J. Electron. Commun. 50, 1996, No. 5, 327-333

S. Dirr, H.-H. Johannes, D. Ammermann, A. Böhler
and W. Kowalsky
Organic Multilayer Electroluminescent Devices Using Lanthanide
b-Diketonates

Extended Abstracts, of the ACS/OSA Symposium on Polymeric and Organic Materials for Optical Applications, Orlando, FL, USA, 1996
418-419

Böhler, A., Ammermann, D., Dirr, S., Kowalsky, W.
Blue and green emitting multilayer organic electroluminescent devices
Proc. Conference on Lasers and Electro-Optics CLEO, Europe '96, Hamburg, 1996

S. Dirr, H.-H. Johannes, D. Ammermann, A. Böhler
and W. Kowalsky
Organic Elektroluminescent Devices Using Rare-Earth Complexe Thin Films Conference on Lasers and Electro-Optics/Europe (CLEO/Europe) '96, Hamburg, 1996

S. Dirr, H.-H. Johannes, D. Ammermann, A. Böhler, W. Grahn and W. Kowalsky
Thin Films of Rare Earth Metal Complexes as Emitter in Organic Elektroluminescent Devices
Inorganic and organic electroluminescence, 8th International Workshop, EL 96 Berlin, ed. by R. H. Mauch, H.-E. Gumlich, Berlin: Wissenschaft und Technik Verlag Dr. Jürgen Groß, 1996, 359-362

A. Böhler, D. Ammermann, S. Dirr, H.-H. Johannes, W. Kowalsky
W. Grahn and A. M. Richter
Low Voltage Operating Blue and Green Elektroluminescent Devices
Inorganic and organic electroluminescence, 8th International Workshop, EL 96 Berlin, ed. by R. H. Mauch, H.-E. Gumlich, Berlin: Wissenschaft und Technik Verlag Dr. Jürgen Groß, 1996, 227-230

A. Böhler, D. Ammermann, C. Rompf, W. Kowalsky, A. M. Richter
H.-H. Johannes and W. Grahn
Low Voltage Blue and Green Emitting Diodes Using Starburst Hole Transport Layers
Proc. International Symposium of the Society of Information Display (SID) '96, San Diego, USA, 1996, 188-191

Kowalsky, W., Ammermann, D., Böhler, A., Dirr, S.
Organic light emitting diodes
International Conference on InP and Related Materials IPRM '96, Schwäbisch-Gmünd, 1996, pp. 450-453




1995

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H.-H. Johannes, W. Grahn, A. Reisner and P. G. Jones
Ethynylated, Vinylated and Hetarylated Indodicarbocyanines by Palladium-Catalyzed Cross-Coupling Reactions
Tetrahedron Letters 1995, Vol. 36, 7225–7228

W. Grahn, H.-H. Johannes, C. B. Jeoung and J. Rheinheimer
Direkte Funktionalisierung von Cyaninen
2. Fachtagung über Iminiumsalze, Stimpfach-Rechenberg bei Aalen, 20.09.–22.09.1995

H.-H. Johannes and W. Grahn
Cross-Coupling Reactions with Cyanines
8th International Symposium on Novel Aromatic Compounds (ISNA), Braunschweig, 30.07.–04.08.1995

W. Grahn, H.-H. Johannes, J. Rheinheimer, B. Knieriem
and E.-U. Würthwein
Halogenated Indocyanines: Synthesis, Conformational Behavior, and Light Absorption
Liebigs Ann. 1995, 1003–1009