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SYOH: Organic and Hybrid Systems for Future Electronics

SYOH 5: Poster

SYOH 5.76: Poster

Donnerstag, 11. März 2004, 18:00–21:00, B

Stability Investigations on Polymer Light Emitting Diodes — •Dessislava Sainova, Armin Wedel, and Bert Fischer — Fraunhofer IAP, Geiselberstr. 69, 14 476 Golm

Organic light emitting diodes (LEDs) are an important topic in the rapidly developing field of flat panel display technologies due to their application potential as backlights and indicators. Polymer utilization as emissive LED-layers offers the advantage of low-cost solution processing on variable substrates.

A significant factor for the successful LED-application is the high operational stability of the devices. The presentation concerns the stability investigations of polymer LEDs. The entire LED preparation starting from the careful substrate cleaning until the encapsulation was made using clean room and glove box facilities. Optimisation procedures have been made on different steps of the device preparation e.g. the deposition conditions of the different layers constituting the devices and the configuration of the electrodes. The lifetime tests on the encapsulated devices have been performed in ambient atmosphere under constant current driving mode of the experimental set up.