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

被引：66
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
收藏
页码：37883 / 37887
页数：5
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