Stable amorphous bis(diarylamino)biphenyl derivatives as hole-transporting materials in OLEDs

被引：0
作者：
Zhanfeng Li
Zhaoxin Wu
Wen Fu
Dongdong Wang
Peng Liu
Bo Jiao
Xiaoli Lei
Guijiang Zhou
Yuying Hao
机构：
[1] Taiyuan University of Technology,College of Physics and Optoelectronics
[2] Xi’an Jiaotong University,Key Laboratory of Photonics Technology for Information of Shaanxi Province, and Key Laboratory for Physical Electronics and Devices of the Ministry of Education, School of Electronic and Information Engineering
来源：
Electronic Materials Letters | 2013年 / 9卷
关键词：
bis(diarylamino)biphenyl; hole-transporting materials; properties; efficiency;
D O I：
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中图分类号：
学科分类号：
摘要：
Stable bis(diarylamino)biphenyl derivatives N4,N4′-di(biphenyl-4-yl)-N4,N4′-bis(2- methylbiphenyl-4-yl)biphenyl-4,4′-diamine (TPD-Ph) and N4,N4′-bis(2′,4′-difluoro- 2-methylbiphenyl-4-yl)-N4,N4′-bis(2′,4′-difluorobiphenyl-4-yl)biphenyl-4,4′-diamine (TPD-(2,4)-F) were synthesized and characterized. High thermal stability (Td ≥ 480°C and Tg ≥ 108°C) in combination with reversible oxidation process render the both promising candidates as hole-transporting materials for organic light-emitting devices. The device with structure of ITO/TPD-Ph/Alq3/LiF/Al presented the highest current efficiency of 4.2 cd A−1 and good operational stability even under the high current density of 350 mA cm−2, which outperformed TPD or NPB-based devices.
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页码：655 / 661
页数：6
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