An Exciplex Host for Deep-Blue Phosphorescent Organic Light-Emitting Diodes

被引：64

作者：

Lim, Hyoungcheol ^{[1
]}

Shin, Hyun ^{[1
]}

Kim, Kwon-Hyeon ^{[1
]}

Yoop, Seung-Jun ^{[1
,3
]}

Huh, Jin-Suk ^{[1
]}

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

机构：

[1] Seoul Natl Univ, Dept Mat Sci & Engn, Seoul 151744, South Korea

[2] Seoul Natl Univ, Res Inst Adv Mat, Seoul 151744, South Korea

[3] LG Chem LTD, Daejun 34122, South Korea

来源：

ACS APPLIED MATERIALS & INTERFACES | 2017年 / 9卷 / 43期

基金：

新加坡国家研究基金会;

关键词：

deep blue exciplex; exciplex host; blue phosphorescent OLED; high triplet level; operational lifetime; charge balance; EXTERNAL QUANTUM EFFICIENCY; ENERGY-TRANSFER; DEVICES; OLEDS; CONVERSION; COMPLEXES; EMISSION; DOPANT; LAYER;

D O I：

10.1021/acsami.7b10914

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The use of exciplex hosts is attractive for high-performance phosphorescent organic light-emitting diodes (PhOLEDs) and thermally activated delayed fluorescence OLEDs, which have high external quantum efficiency, low driving voltage, and low efficiency roll-off. However, exciplex hosts for deep-blue OLEDs have not yet been reported because of the difficulties in identifying suitable molecules. Here, we report a deep-blue-emitting exciplex system with an exciplex energy of 3.0 eV. It is composed of a carbazole-based hole transporting material (mCP) and a phosphine-oxide-based electron-transporting material (BM-A10). The blue PhOLEDs exhibited maximum external quantum efficiency of 24% with CIE coordinates of (0.15, 0.21) and longer lifetime than the single host devices.

引用

页码：37883 / 37887

页数：5

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