Hole-transporting small molecules as a mixed host for efficient solution processed green phosphorescent organic light emitting diodes

被引：10
作者：
Dong, Dan [1 ]
Xia, Jingcheng [2 ]
Yang, Shuai [1 ]
Wu, Xinkai [1 ]
Wei, Bingwu [1 ]
Lian, Lu [1 ]
Feng, Dongxu [1 ]
Zheng, Youxuan [2 ]
He, Gufeng [1 ]
机构：
[1] Shanghai Jiao Tong Univ, Dept Elect Engn, Natl Engn Lab TFT LCD Mat & Technol, Shanghai 200240, Peoples R China
[2] Nanjing Univ, Sch Chem & Chem Engn, State Key Lab Coordinat Chem, Nanjing Natl Lab Microstruct, Nanjing 210093, Jiangsu, Peoples R China
来源：
ORGANIC ELECTRONICS | 2016年 / 38卷
基金：
中国国家自然科学基金;
关键词：
Small molecule; Hole-transporting; Mixed host; Solution processed; Phosphorescent OLEDs; BLUE; DEVICES; LAYER;
D O I：
10.1016/j.orgel.2016.07.031
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We have demonstrated highly efficient and reduced efficiency roll-off solution processed green phosphorescent organic light emitting diodes (OLEDs) utilizing two hole-transporting small molecular materials of 1,3-bis(carbazol-9-yl)benzene (mCP) and 4,4',4"-tris(N-carbazolyl)-triphenylamine (TCTA) as a mixed host. Compared with the corresponding two single host devices, the mixed host one shows a superior overall performance. A low driving voltage of 5.5 V at 1000 cd/m(2) with a current efficiency of 39.5 cd/A is achieved in the mCP:TCTA (3:1) mixed host device. Even at the luminance of 10000 cd/m(2), the efficiency still reaches 28.6 cd/A. The enhanced charge carrier balance and broadened exciton recombination zone due to the mixed host contribute to the improvement of efficiency and efficiency roll-off. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：29 / 34
页数：6
相关论文
共 25 条
[1]   Transient analysis of organic electrophosphorescence. II. Transient analysis of triplet-triplet annihilation [J].
Baldo, MA ;
Adachi, C ;
Forrest, SR .
PHYSICAL REVIEW B, 2000, 62 (16) :10967-10977
[2]   High-Efficiency Solution-Processed Small Molecule Electrophosphorescent Organic Light-Emitting Diodes [J].
Cai, Min ;
Xiao, Teng ;
Hellerich, Emily ;
Chen, Ying ;
Shinar, Ruth ;
Shinar, Joseph .
ADVANCED MATERIALS, 2011, 23 (31) :3590-+
[3]   Solution-processable small molecules as efficient universal bipolar host for blue, green and red phosphorescent inverted OLEDs [J].
Chen, Jiangshan ;
Shi, Changsheng ;
Fu, Qiang ;
Zhao, Fangchao ;
Hu, Yue ;
Feng, Yuling ;
Ma, Dongge .
JOURNAL OF MATERIALS CHEMISTRY, 2012, 22 (11) :5164-5170
[4]   Soluble processed low-voltage and high efficiency blue phosphorescent organic light-emitting devices using small molecule host systems [J].
Doh, Yoo Jin ;
Park, Jung Soo ;
Jeon, Woo Sik ;
Pode, Ramchandra ;
Kwon, Jang Hyuk .
ORGANIC ELECTRONICS, 2012, 13 (04) :586-592
[5]   Solution processable small molecules for organic light-emitting diodes [J].
Duan, Lian ;
Hou, Liudong ;
Lee, Tae-Woo ;
Qiao, Juan ;
Zhang, Deqiang ;
Dong, Guifang ;
Wang, Liduo ;
Qiu, Yong .
JOURNAL OF MATERIALS CHEMISTRY, 2010, 20 (31) :6392-6407
[6]   High-performance multilayered phosphorescent OLEDs by solution-processed commercial electron-transport materials [J].
Earmme, Taeshik ;
Jenekhe, Samson A. .
JOURNAL OF MATERIALS CHEMISTRY, 2012, 22 (11) :4660-4668
[7]   Solution-Processed Small Molecules As Mixed Host for Highly Efficient Blue and White Phosphorescent Organic Light-Emitting Diodes [J].
Fu, Qiang ;
Chen, Jiangshan ;
Shi, Changsheng ;
Ma, Dongge .
ACS APPLIED MATERIALS & INTERFACES, 2012, 4 (12) :6579-6586
[8]   Direct Observation of Efficient Triplet-Triplet Energy Transfer in Phosphorescent Organic Light-Emitting Diode [J].
Fukagawa, Hirohiko ;
Shimizu, Takahisa ;
Osada, Yoshichika ;
Kamada, Taisuke ;
Kiribayashi, Yukihiro ;
Yamamoto, Toshihiro ;
Shimidzu, Naoki .
APPLIED PHYSICS EXPRESS, 2013, 6 (05)
[9]   FLEXIBLE LIGHT-EMITTING-DIODES MADE FROM SOLUBLE CONDUCTING POLYMERS [J].
GUSTAFSSON, G ;
CAO, Y ;
TREACY, GM ;
KLAVETTER, F ;
COLANERI, N ;
HEEGER, AJ .
NATURE, 1992, 357 (6378) :477-479
[10]   Efficient solution-processed small-molecule single emitting layer electrophosphorescent white light-emitting diodes [J].
Hou, Liudong ;
Duan, Lian ;
Qiao, Juan ;
Zhang, Deqiang ;
Dong, Guifang ;
Wang, Liduo ;
Qiu, Yong .
ORGANIC ELECTRONICS, 2010, 11 (08) :1344-1350
123