共 23 条
Dibenzothiophene derivatives as host materials for high efficiency in deep blue phosphorescent organic light emitting diodes
被引:93
作者:

Jeong, Sook Hee
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机构:
Dankook Univ, Dept Polymer Sci & Engn, Yongin 448701, Gyeonggi, South Korea Dankook Univ, Dept Polymer Sci & Engn, Yongin 448701, Gyeonggi, South Korea

Lee, Jun Yeob
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机构:
Dankook Univ, Dept Polymer Sci & Engn, Yongin 448701, Gyeonggi, South Korea Dankook Univ, Dept Polymer Sci & Engn, Yongin 448701, Gyeonggi, South Korea
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.
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页码:14604 / 14609
页数:6
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