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SYOF: Organische Festkörper

SYOF 5: Poster Session

SYOF 5.42: Poster

Tuesday, March 27, 2001, 17:00–19:00, Aula S3

Combinatorial Study of Organic Devices — •Helmut Hänsel¹, Heiko Zettl¹, Armin Knoll¹, Georg Krausch¹, Christoph Schmitz², Mukundan Thelakkat², and Hans-Werner Schmidt² — ¹Universität Bayreuth, Physikalische Chemie II, D-95447 Bayreuth — ²Universität Bayreuth, Makromolekulare Chemie I, D-95447 Bayreuth

With the increasing demand for organic devices the understanding of their long-term behaviour becomes more and more important. We present the testing of multi-layer OLEDs with a systematic thickness variation of the layers. /par Two gradients of two different materials (e.g. Alq₃, DiMeOTPD) are evaporated onto a square ITO-glass substrate. Evaporation of 8x8 Al-elctrodes leads to 64 different diodes. In order to study the long-term behaviour of the diodes, we have developed a setup for simultaneous testing where each diode is driven at constant current. Additionally, electroluminescence- and IV-curves a recorded regularly. This will give us further insight on how film thickness and layer order affect long-term stability and what processes are related to it.