Dibenzothiophene derivatives as host materials for high efficiency in deep blue phosphorescent organic light emitting diodes

被引:93
作者
Jeong, Sook Hee [1 ]
Lee, Jun Yeob [1 ]
机构
[1] Dankook Univ, Dept Polymer Sci & Engn, Yongin 448701, Gyeonggi, South Korea
关键词
HIGH-TRIPLET-ENERGY; ELECTROPHOSPHORESCENT DEVICES; PHOSPHINE-OXIDE; CARBAZOLE;
D O I
10.1039/c1jm12421h
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Various dibenzothiophene derivatives were synthesized as high triplet energy host materials for deep blue phosphorescent organic light-emitting diodes (PHOLEDs) and their device performances were investigated. Dibenzothiophene host materials with a hole transport type carbazole and electron transport type phosphine oxide moieties showed high quantum efficiency and low driving voltage due to balanced charge injection and transport. A high quantum efficiency of 20.2% and only 10% reduction of quantum efficiency at 1000 cd m(-2) were demonstrated from the deep blue PHOLEDs with the dibenzothiophene based high triplet energy host materials.
引用
收藏
页码:14604 / 14609
页数:6
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