Dr. Christian D. Schildknecht Profile

Dr. Christian D. Schildknecht

at BASF Aktiengesellschaft

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Author

Publications (8)

Proceedings Article | 13 September 2012 Paper

Host materials for blue phosphorescent OLEDs

Daniel Wagner, Michael Rothmann, Peter Strohriegl, Christian Lennartz, Ingo Münster, Gerhard Wagenblast, Christian Schildknecht

Proceedings Volume 8476, 84761O (2012) https://doi.org/10.1117/12.928913

KEYWORDS: Organic light emitting diodes, Electron transport, Absorption, Crystals, Phosphorescence, Luminescence, Temperature metrology, Energy transfer, Spectroscopy, Oxidation

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Proceedings Article | 18 May 2010 Paper

IR studies on the interaction of Ca and Mg with the blue emitter material Ir(cn-pmbic)3

Tobias Glaser, Martin Binder, Annemarie Pucci, Christian Schildknecht, Christian Lennartz

Proceedings Volume 7722, 77221B (2010) https://doi.org/10.1117/12.853863

KEYWORDS: Calcium, Magnesium, Metals, Gold, Infrared spectroscopy, Interfaces, Molecules, Reflectivity, Molecular interactions, Thin films

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Proceedings Article | 2 September 2008 Paper

Charge injecting layers for admittance spectroscopy

M. Hoping, C. Schildknecht, H. Gargouri, T. Riedl, M. Tilgner, H.-H. Johannes, W. Kowalsky

Proceedings Volume 7051, 70511D (2008) https://doi.org/10.1117/12.794180

KEYWORDS: Capacitance, Electrons, Spectroscopy, Oxides, Cesium, Aluminum, Electrodes, Organic materials, Gold, Spectroscopes

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Proceedings Article | 16 October 2007 Paper

Recent progress in deep-blue phosphorescent OLEDs

C. Schildknecht, C. Lennartz, K. Kahle, O. Molt, E. Fuchs, N. Moonen, J. Rudolph, G. Wagenblast, P. Amrhein, J. Proelss, I. Muenster

Proceedings Volume 6655, 665502 (2007) https://doi.org/10.1117/12.741441

KEYWORDS: Organic light emitting diodes, Absorption, Molecules, Excitons, Quantum efficiency, Ionization, Diodes, Ultraviolet radiation, Solid state physics, Control systems

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Proceedings Article | 8 October 2005 Paper

Novel deep-blue emitting phosphorescent emitter

C. Schildknecht, G. Ginev, A. Kammoun, T. Riedl, W. Kowalsky, H.-H. Johannes, C. Lennartz, K. Kahle, M. Egen, T. Geßner, M. Bold, S. Nord, P. Erk

Proceedings Volume 5937, 59370E (2005) https://doi.org/10.1117/12.614331

KEYWORDS: Organic light emitting diodes, Quantum efficiency, Interfaces, Doping, Polymethylmethacrylate, Polymers, Excitons, External quantum efficiency, Electron transport, Laser induced fluorescence

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Proceedings Article | 23 September 2005 Paper

Monolithic integration of OFETs driving organic light emitting diodes

Michael Kröger, Eike Becker, Christian Schildknecht, Sören Hartmann, Hans-Hermann Johannes, Wolfgang Kowalsky

Proceedings Volume 5940, 59401I (2005) https://doi.org/10.1117/12.618157

KEYWORDS: Organic light emitting diodes, Field effect transistors, Transistors, Optical lithography, Dielectrics, Organic materials, LCDs, Polymers, Organic semiconductors, Gold

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Organic field effect transistors are expected to be applicable for low-cost, large-area electronic applications, e.g. the incorporation as active-matrix into displays based on organic light emitting diodes (OLED). There are two major challenges which have to be tackled. As the low charge carrier mobility allows only for comparatively low saturation currents, the ratio of channel width and length has to increase by several orders of magnitude, compared to poly-Si-technology. Furthermore, as organic semiconductor devices usually degrade upon exposure to solvents, standard photolithography cannot be applied once the organic materials have been deposited. Therefore, the definition of single pixels has to occur before the deposition of organic materials. We prepared OFETs employing a bottom-Al-gate, an 50 nm thick anodized Al-oxide gate dielectric and a inter-digital drain-source-structure (Au), topped with 30 nm of pentacene as active layer. By applying an inter-digital structure we increased the W/L-ratio to 4340. For the given configuration, a saturation current of 4 mA could be observed at -20 V drain-source- and -20 V gate-source-voltage. The drain-source-contacts enclosed a predefined ITO-anode shorted to drain and acting as OLED-anode. For preventing shortcuts between the OLED-cathode and the OFET, poly-vinyl-alcohol (PVOH) was spin-coated from an aqueous solution and structurized by photolithography. When the OFET characteristics were measured afterwards the field-effect- mobility dropped by two orders of magnitude but recovered due to desorption of residual water. Afterwards, the organic layers and a Al/LiF-cathode were deposited. The area covered by the OLED was 1.33mm². Applying an operating bias of 11 V between cathode and source, allows for switching of the OLED by changing the gate-source-voltage from +2.5 V to -5 V. The on-state-brightness is 850 cd/m² and the on-off-ratio 950. Considering a realistic filling factor of 40% the values observed may be sufficient for active-matrix display-applications.

Proceedings Article | 16 February 2004 Paper

Inverted topside-emitting organic light-emitting diodes

Thomas Dobbertin, Daniel Schneider, Anis Kammoun, Jens Meyer, Oliver Werner, Michael Kroeger, Thomas Riedl, Eike Becker, Christian Schildknecht, Hans-Hermann Johannes, Wolfgang Kowalsky

Proceedings Volume 5214, (2004) https://doi.org/10.1117/12.505811

KEYWORDS: Organic light emitting diodes, Electrodes, Metals, Aluminum, Luminous efficiency, Magnesium, Sputter deposition, Electroluminescence, Thin films, Polymers

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Proceedings Article | 16 February 2004 Paper

Laser threshold analysis of first- and second-order organic solid state distributed feedback laser

Daniel Schneider, Soeren Hartmann, Thomas Dobbertin, Torsten Benstem, Dirk Metzdorf, Eike Becker, Anis Kammoun, Christian Schildknecht, Henning Krautwald, Hans-Hermann Johannes, Thomas Riedl, Wolfgang Kowalsky

Proceedings Volume 5214, (2004) https://doi.org/10.1117/12.505792

KEYWORDS: Laser damage threshold, Solid state lasers, Fiber Bragg gratings, Refractive index, Luminescence, Thin films, Resonators, Doping, Polarization, Optical pumping

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Showing 5 of 8 publications

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