Linkage engineering in hosts for dramatic efficiency enhancement of blue phosphorescent organic light-emitting diodes

被引：11

作者：

Fan, Chaochao ^{[1
,2
]}

Wei, Ying ^{[1
]}

Ding, Dongxue ^{[2
]}

Xu, Hui ^{[2
]}

机构：

[1] Heilongjiang Univ, Sch Electromech Engn, Harbin 150080, Peoples R China

[2] Heilongjiang Univ, Sch Chem & Mat, Key Lab Funct Inorgan Mat Chem, Minist Educ, Harbin 150080, Peoples R China

来源：

OPTICS EXPRESS | 2015年 / 23卷 / 10期

关键词：

PHOSPHINE-OXIDE HOSTS; HIGH TRIPLET ENERGY; LOW DRIVING VOLTAGE; BIPOLAR HOST; ELECTROPHOSPHORESCENCE; GREEN; SERIES; RED;

D O I：

10.1364/OE.23.012887

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Higher triplet energy and balanced charge mobility is two key factors for high-efficiency host materials of phosphorescent organic light-emitting diodes (PhOLED), which are integrated in a carbazolediphenylene-fluorene hybrid FDPCz2 (9,9'-(4',4 ''-(9H-fluorene-9,9diyl)bis(biphenyl-4', 4-diyl))bis(9H-carbazole)) on the basis of indirect linkage strategy. Owing to rationally spatial allocation of conjugation blocking and extension for diphenylene linkages, FDPCz2 achieves both high triplet energy of 2.97 eV and favorable charge mobility by order of 6.3 x 10(-6) cm(2) V-1 s(-1). Compared to conventional hosts and a short-conjugated analogue FPCz2 (9,9'-(4,4'-(9H-fluorene-9,9-diyl)bis(4,1-phenylene)) bis(9H-carbazole)), FDPCz2 dramatically elevated device efficiencies with peak values of 40.6 cd A(-1) and 20.2% for blue PhOLEDs. (C) 2015 Optical Society of America

引用

页码：12887 / 12899

页数：13