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High-efficiency green phosphorescent organic light-emitting devices with chemically doped layers

被引：111
作者：
Watanabe, Soichi
Ide, Nobuhiro
Kido, Junji [1 ]
机构：
[1] Yamagata Univ, Grad Sch Sci & Engn, Yonezawa, Yamagata 9928510, Japan
[2] Optoelect Ind & Technol Dev Assoc, Bunkyo Ku, Tokyo 1120014, Japan
[3] Res Inst Organ Elect, Yonezawa, Yamagata 9921128, Japan
来源：
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS | 2007年 / 46卷 / 3A期
关键词：
organic electroluminescence; chemical doping; high efficiency; phosphorescence; iridium complex;
D O I：
10.1143/JJAP.46.1186
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We have developed green phosphorescent organic light-emitting devices (OLEDs) with high quantum and luminous efficiencies. A green phosphorescent metal complex, fac-tris(2-phenylpyridine) iridium [Ir(ppy)(3)], was used as an emitter material. Wide-energy-gap materials with high triplet excited energy levels were used as host materials for Ir(ppy)3 and as carrier transport materials. Hole injection and electron injection from the electrodes were balanced by placing chemically doped layers at the interface between the electrodes and the organic layers. In addition, a highly reflective Ag cathode was employed as an anode, instead of a conventional Al cathode to enhance the reflectivity of the cathode metal. An optimized device exhibited an external quantum efficiency (EQE) of 27% (95 cd/A) and a high power efficiency of 97 lm/W at 100 cd/m(2) at 3.1 V.
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页码：1186 / 1188
页数：3
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