期刊
ORGANIC ELECTRONICS
卷 10, 期 5, 页码 954-959出版社
ELSEVIER
DOI: 10.1016/j.orgel.2009.04.024
关键词
Triphenylamine; Dendrimer; High T-g; Solution process
资金
- 973 program [2009CB623605]
- NSFC [50673035]
- China Ministry of Education [1306009]
Two solution processable pi-conjugated triphenylamine-based dendrimers, Tr-TPA3 and Tr-TPA9 were served as hole-transporting materials (HTMs) for organic light-emitting devices (OLEDs), The two dendrimers exhibit similar absorption and emission behaviors in solutions and thin films, which demonstrate that these dendrimers can form amorphous states in their films. The dendrimers showed excellent solubility, which are soluble in common organic solvents such as chloroform, tetrahydrofuran, and 1,1,2,2-tetrachloroethane, high thermal stability with high glass-transition temperature (T-g) of 115 degrees C for Tr-TPA3 and 140 degrees C for Tr-TPA9, high the highest unoccupied molecular orbital (HOMO) energy level (-5.12 eV for Tr-TPA3 and -4.95 eV for Tr-TPA9, respectively) and good film forming property. When we employed these dendrimers as hole transport layer (HTL) in tris-(8-hydroxyquinoline) aluminum (Alq(3))-emitting electroluminescence (EL) devices, the Tr-TPA9-based double-layer device exhibited the turn-on voltage of 2.5 V, the maximum luminance of about 11,058 cd m(-2) and the maximum current efficiency of 4.01 cd A(-1). The comparison of the properties between the EL devices with dendrimers as HTL and the EL device with 1,4-bis(1-naphthylphenylamino)biphenyl (NPB) as HTL indicated that this series of dendrimers can be good candidates for HTM in OLEDs. (C) 2009 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据