Efficient solution-processed small-molecule single emitting layer electrophosphorescent white light-emitting diodes

被引：77

作者：

Hou, Liudong ^{[1
]}

Duan, Lian ^{[1
]}

Qiao, Juan ^{[1
]}

Zhang, Deqiang ^{[1
]}

Dong, Guifang ^{[1
]}

Wang, Liduo ^{[1
]}

Qiu, Yong ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Chem, Key Lab Organ Optoelect & Mol Engn, Minist Educ, Beijing 100084, Peoples R China

来源：

ORGANIC ELECTRONICS | 2010年 / 11卷 / 08期

关键词：

OLED; Small molecules; Solution process; White light emission; Transient spectra; PHOSPHORESCENT OLEDS; HOST MATERIALS; DEVICES; COMPLEXES; EMISSION;

D O I：

10.1016/j.orgel.2010.05.015

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Efficient single emitting layer electrophosphorescent white organic light-emitting diodes (WOLEDs) based on small molecules were fabricated by solution process. A solution processible wide-gap compound 9,9-bis[4-(3,6-di-tert-butylcarbazol-9-yl)phenyl] fluorene (TBCPF) was used as the host material and 1,3-bis[(4-tert-butylphenyl)-1,3,4-oxidiazol-yl] phenylene (OXD-7) was doped to enhance the electron transport in the emission layer. The optimized single active layer WOLED with three phosphorescent dopants showed a maximum luminance efficiency of 20.8 cd A (1) and a maximum luminance of 26,600 cd m (2). And the maximum efficiency of double-layer WOLEDs with an additional hole-blocking/electron-transporting layer was further improved to 29.6 cd A (1). The color of the devices shifted slightly with the bias voltage. The energy transfer processes and the origin of the white emission in the single emitting layer were also discussed based on the measurement of the transient photoluminescence. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：1344 / 1350

页数：7

共 24 条

[1] Highly efficient phosphorescent emission from organic electroluminescent devices [J].