Regensburg 2002 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe

SYOH: Organische Halbleiter

SYOH IV: HV IV

SYOH IV.1: Hauptvortrag

Montag, 11. März 2002, 14:40–15:20, H37

Electrical and Optical Tuning of Organic Light Emitting Devices — •Walter Riess, Heike Riel, Tilman Beierlein, Horst Hofmann, Beat Ruhstaller, Dave Gundlach, Constance Rost, Brian Crone, Siegfried Karg, and Peter Müller — IBM Research, Zurich Research Laboratory, Säumerstrasse 4, CH-8803 Rüschlikon, Switzerland

Organic light-emitting devices (OLEDs) are emerging as the leading candidate among the many technologies under development for next generation flat panel displays. OLEDs can be fabricated cost-effectively on large, even flexible substrates and already offer better performance in many respects than established technologies. Since device performance of OLEDs crucially depends on the detailed device structure we have developed a UHV evaporation system for combinatorial studies. Our system allows the simultaneous fabrication of 10x10 individual devices on one substrate enabling a systematic variation of device parameters such as layer thickness, sequence, doping concentration as well as materials and electrodes. This approach permits rapid optimization of device performance and provides a broad data set for device modeling. Via electrical and optical modeling we are able to make quantitative predictions on the device characteristics. We will show results on multilayer OLEDs ranging from the conventional Kodak trilayer to doped complex multilayer structures with external efficiencies up to 70cd/A. An overview of the status, promises and challenges of this emerging and disruptive display technology will also be presented.