Improving the performance of blue phosphorescent organic light-emitting devices using a composite emitter

被引：38

作者：

Chu, Miao-Tsai ^{[1
,2
]}

Lee, Meng-Ting ^{[1
]}

Chen, Chin H. ^{[3
]}

Tseng, Mei-Rurng ^{[1
]}

机构：

[1] Ind Technol Res Inst, Mat & Chem Res Labs, Hsinchu 310, Taiwan

[2] Natl Chiao Tung Univ, Master Degree Program, Flat Panel Display Technol, Hsinchu 300, Taiwan

[3] Natl Chiao Tung Univ, Display Inst, Microelect & Informat Syst Res Ctr, Hsinchu 300, Taiwan

来源：

ORGANIC ELECTRONICS | 2009年 / 10卷 / 06期

关键词：

OLED; Phosphorescent; Blue emitter; Carrier transport; TRIPLET EXCITONS; HOST MATERIALS;

D O I：

10.1016/j.orgel.2009.06.005

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A composite emitter is constructed by doping a carrier-transporting material into a conventional emitter composing of only host and dopant. The transport of carriers from either hole- or electron-transporting layer into the emitter can be promoted through the carrier-transporting material, in particular, when a wide-band-gap host material is used. A blue phosphorescent OLED based on iridium(III)bis((4,6-difluorophenyl)-pyridinate-N,C-2')-pico-linate (FIrpic) as dopant in the composite emitter achieved a power efficiency of 20 lm/W and a low driving voltage of 4.2 V at 1000 cd/m(2), whose current efficiency at 20 mA/cm(2) was 2.5 times better than that of device using the conventional emitter. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：1158 / 1162

页数：5

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