Blue Phosphorescent Organic Light-Emitting Diodes Using an Exciplex Forming Co-host with the External Quantum Efficiency of Theoretical Limit

被引：254

作者：

Shin, Hyun ^{[1
]}

Lee, Sunghun ^{[2
]}

Kim, Kwon-Hyeon ^{[2
]}

Moon, Chang-Ki ^{[1
]}

Yoo, Seung-Jun ^{[2
]}

Lee, Jeong-Hwan ^{[2
]}

Kim, Jang-Joo ^{[1
,2
]}

机构：

[1] Seoul Natl Univ, Dept Mat Sci & Engn, Seoul 151742, South Korea

[2] Seoul Natl Univ, Dept Mat Sci & Engn, WCU Hybrid Mat Program, Seoul 151742, South Korea

来源：

ADVANCED MATERIALS | 2014年 / 26卷 / 27期

关键词：

BIPOLAR HOST MATERIALS; HIGH-TRIPLET-ENERGY; PHOSPHINE OXIDE; DEVICES; GREEN; ORIENTATION; CARBAZOLE; MOLECULES; LAYER; FILMS;

D O I：

10.1002/adma.201400955

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A high-efficiency blue-emitting organic light-emitting diode (OLED) approaching theoretical efficiency using an exciplex-forming co-host composed of N,N'-dicarbazolyl-3,5-benzene (mCP) and bis-4,6-(3,5-di-3-pyridylphenyl)-2-methylpyrimidine (B3PYMPM) is fabricated. Iridium(III) bis[(4,6-difluorophenyl)-pyridinato-N, C2']picolinate (FIrpic) is used as the emitter, which turns out to have a preferred horizontal dipole orientation in the emitting layer. The OLED shows a maximum external quantum efficiency of 29.5% (a maximum current efficiency of 62.2 cd A(-1)), which is in perfect agreement with the theoretical prediction.

引用

页码：4730 / +

页数：6

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