Architectures for efficient electrophosphorescent organic light-emitting devices

被引：51

作者：

Adachi, C ^{[1
]}

Thompson, ME

Forrest, SR

机构：

[1] Princeton Univ, Dept Elect Engn, POEM, Princeton, NJ 08544 USA

[2] Chitose Inst Sci & Technol, Dept Photon Mat Sci, Chitose, Hokkaido 0668566, Japan

[3] Univ So Calif, Dept Chem, Los Angeles, CA 90089 USA

来源：

IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS | 2002年 / 8卷 / 02期

关键词：

electrophosphorescence; exciton; fluorescence; organic light-emitting device; triplet state;

D O I：

10.1109/2944.999192

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

We discuss several device architectures leading to high-efficiency organic electrophosphorescent (EP) light emission. An external electroluminescence efficiency (eta(ext)) of (10.0 +/- 0.5)% was realized by doping fac-tris(2-phenylpyridine)iridium (Ir(ppy)(3)) into a 2,9-dimethyl-4,7-diphenyl-1,10-phenenthroline (BCP) electron transport layer. Direct exciton formation on the phosphor dopant avoids exciplex formation at the interface of unipolar hole and electron transport layers. Further, triplet exciton and carrier dynamics in a double heterostructure were investigated to determine the location and width of the exciton formation zone. High-efficiency EP is also demonstrated in a simplified two layer architecture using a 4,4'-N, N'-dicarbazole-biphenyl (CBP) ambipolar carrier transport host.

引用

页码：372 / 377

页数：6

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