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Proceedings Paper

Highly efficient organic light emitting diodes (OLED) for diplays and lighting
Author(s): Rico Meerheim; Karsten Walzer; Gufeng He; Martin Pfeiffer; Karl Leo
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Paper Abstract

In this contribution, we discuss several research results which have contributed to the vision of a broad application of organic light emitting diodes in displays and lighting. We discuss the factors which determine the efficiency of OLEDs. First, we briefly discuss work on the controlled molecular doping of organic semiconductors, having the same advantageous influence on the device properties than in inorganic semiconductor devices, in particular in reducing the operating voltage. By comparison with a simple theory, we show that the voltages achieved with doped OLEDs are already very close to the thermodynamic limit. We then show, with the example of red phosphorescent OLEDs, how many properties of the OLED are improved by doping.

Paper Details

Date Published: 20 April 2006
PDF: 16 pages
Proc. SPIE 6192, Organic Optoelectronics and Photonics II, 61920P (20 April 2006); doi: 10.1117/12.666905
Show Author Affiliations
Rico Meerheim, Technische Univ. Dresden (Germany)
Karsten Walzer, Technische Univ. Dresden (Germany)
Gufeng He, Technische Univ. Dresden (Germany)
Martin Pfeiffer, Technische Univ. Dresden (Germany)
Karl Leo, Technische Univ. Dresden (Germany)

Published in SPIE Proceedings Vol. 6192:
Organic Optoelectronics and Photonics II
Paul L. Heremans; Michele Muccini; Eric A. Meulenkamp, Editor(s)

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