Highly efficient organic light emitting diodes (OLED) for diplays and lighting

Rico Meerheim; Karsten Walzer; Gufeng He; Martin Pfeiffer; Karl Leo

doi:10.1117/12.666905

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20 April 2006 Highly efficient organic light emitting diodes (OLED) for diplays and lighting

Rico Meerheim, Karsten Walzer, Gufeng He, Martin Pfeiffer, Karl Leo

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Proceedings Volume 6192, Organic Optoelectronics and Photonics II; 61920P (2006) https://doi.org/10.1117/12.666905
Event: SPIE Photonics Europe, 2006, Strasbourg, France

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.

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Rico Meerheim, Karsten Walzer, Gufeng He, Martin Pfeiffer, and Karl Leo "Highly efficient organic light emitting diodes (OLED) for diplays and lighting", Proc. SPIE 6192, Organic Optoelectronics and Photonics II, 61920P (20 April 2006); https://doi.org/10.1117/12.666905

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