A Highly Efficient, Blue-Phosphorescent Device Based on a Wide-Bandgap Host/FIrpic: Rational Design of the Carbazole and Phosphine Oxide Moieties on Tetraphenylsilane

被引：116

作者：

Liu, He ^{[1
]}

Cheng, Gang ^{[1
,2
]}

Hu, Dehua ^{[1
]}

Shen, Fangzhong ^{[1
]}

Lv, Ying ^{[1
]}

Sun, Guannan ^{[1
]}

Yang, Bing ^{[1
]}

Lu, Ping ^{[1
]}

Ma, Yuguang ^{[1
]}

机构：

[1] Jilin Univ, State Key Lab Supramol Struct & Mat, Changchun 130012, Peoples R China

[2] Jilin Univ, State Key Lab Integrated Optoelect, Coll Elect Sci & Engn, Changchun 130012, Peoples R China

来源：

ADVANCED FUNCTIONAL MATERIALS | 2012年 / 22卷 / 13期

基金：

美国国家科学基金会;

关键词：

wide bandgap materials; tetraphenylsilane; carbazole; phosphine oxide; LIGHT-EMITTING-DIODES; ORGANIC ELECTROLUMINESCENT DEVICES; HIGH TRIPLET ENERGY; HOST MATERIALS; ELECTROPHOSPHORESCENT DEVICES; BIPOLAR HOST; GREEN; OLEDS;

D O I：

10.1002/adfm.201103126

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A new series of wide-bandgap materials, 4-dipenylphosphine oxide-4'-9H-carbazol-9-yl-tetraphenylsilane (CSPO), 4-diphenylphosphine oxide-4',4?-di(9H-carbazol-9-yl)-tetraphenylsilane (pDCSPO), 4-diphenylphosphine oxide -4'-[3-(9H-carbazol-9-yl)-carbazole-9-yl]-tetraphenylsilane (DCSPO), 4-diphenylphosphine oxide-4',4?,4?'-tri(9H-carbazol-9-yl)-tetraphenylsilane (pTCSPO) and 4-diphenylphosphine oxide -4'-[3,6-di(9H-carbazol-9-yl)-9H-carbazol-9-yl]-tetraphenylsilane (TCSPO), containing different ratios and linking fashions of p-type carbazole units and n-type phosphine oxide units, are designed and obtained. DCSPO is the best host in FIrpic-doped devices for this series of compounds. By utilizing DCzSi and DPOSi as hole- and electron-transporting layers, a high EQE of 27.5% and a maximum current efficiency of 49.4 cd A-1 are achieved in the DCSPO/FIrpic doped device. Even at 10 000 cd m-2, the efficiencies still remain 41.2 cd A-1 and 23.0%, respectively.

引用

页码：2830 / 2836

页数：7

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