Power efficiency improvement in a tandem organic light-emitting diode

被引：172

作者：

Liao, L. S. ^{[1
]}

Klubek, K. P. ^{[1
]}

机构：

[1] Eastman Kodak Co, Res Labs, Rochester, NY 14650 USA

来源：

APPLIED PHYSICS LETTERS | 2008年 / 92卷 / 22期

关键词：

Organic light emitting diodes (OLED) - Electroluminescence;

D O I：

10.1063/1.2938269

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

When a tandem light-emitting diode (OLED) utilizes unoptimized electroluminescent (EL) units, it is fairly easy to improve the power efficiency of such a device. However, when a tandem OLED utilizes optimized EL units, improved power efficiency can only be achieved if each intermediate connector has excellent carrier injection capabilities along with a negligible voltage drop across it. Four organic intermediate connectors were studied in this work, one of which consisting of a Li-doped 4,7-diphenyl-1,10-phenanthroline layer and a 1,4,5,8,9,11-hexaazatriphenylene hexacarbonitrile layer, exhibits the best power efficiency improvement for tandem OLEDs. (C) 2008 American Institute of Physics.

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页数：3

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