Berlin 2005 – wissenschaftliches Programm
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SYOO: Organic Optoelectronics and Photonics
SYOO 6: Poster
SYOO 6.9: Poster
Montag, 7. März 2005, 18:00–20:00, Poster TU A
Laser Ablation for OLED Displays — •Wiebke Sarfert1, Dirk Buchhauser2, Christoph Gaerditz1, Carsten Tschamber1, Arvid Hunze3, Ralph Paetzold3, Karsten Heuser3, and Albrecht Winnacker1 — 1Department of Materials Science VI, University of Erlangen-Nuremberg, Germany — 2Department of Experimental Physics, University Freiberg, Germany — 3Siemens AG, CT MM 1, Paul-Gossen-Str.100, 91052 Erlangen, Germany
Displays based on Organic Light-Emitting Devices (OLEDs) employing a passive matrix driving scheme suffer from the need to structure the metallic cathode into lines using an expensive and time-consuming lithographic process, which in addition may disturb the uniform deposition of the electroluminescent material.
We present an alternative approach for structuring the cathode using pulsed laser ablation of fine lines of the top metal layers following their deposition. A setup capable of handling 6No-dq substrates using a frequency-doubled Nd:YAG laser is introduced and explained.
First experiments give promising results regarding the electrical separation of the cathode lines while no detrimental effects on performance and lifetime of laser-structured devices are observed.