文献类型：期刊文献

英文题名：Electroluminescent properties of poly[N,N′-bis(4-butylphenyl)-N, N′-bis(phenyl)benzidine] doped with 1,3,5-Tris(1-phenyl-1H-benzimidazol-2-yl)benzene

作者：Yin, Yuehong[1,2];Deng, Zhenbo[2];Lu, Zhaoyue[3];Li, Xiong[4];Li, Ming[1];Liu, Bingguo[1];Wang, Yongsheng[2];Teng, Feng[2]

机构：[1]Henan Polytech Univ, Inst Phys Chem, Dept Appl Phys, Jiaozuo 454000, Henan, Peoples R China;[2]Beijing Jiaotong Univ, Inst Optoelect Technol, Key Lab Luminescence & Opt Informat, Minist Educ, Beijing 100044, Peoples R China;[3]E China Univ Sci & Technol, Sch Sci, Dept Phys, Shanghai 200237, Peoples R China;[4]Beijing Technol & Business Univ, Dept Phys, Beijing 100048, Peoples R China

年份：2015

卷号：38

起止页码：32

外文期刊名：DISPLAYS

收录：;EI(收录号：20151200651642);WOS:【SCI-EXPANDED(收录号:WOS:000356208900004)】；

基金：This project was supported by National Natural Science Foundation of China (Nos. 61274063, 61125505, 61007021, 11204067 and 10874053), Beijing Technology and Business University Young Teachers Scientific Research Foundation (QNJJ2011-45), Science and Technology Research Project of Henan province (Grant No. 092102210242, 092300410215). All the experiments in this Letter were done in the Institute of Optoelectronic Technology at Beijing Jiaotong University.

语种：英文

外文关键词：Excimer; Electromer; Electroluminescence; poly-TPD; TPBi; OLED

摘要：The effect of 1,3,5-Tris(1-phenyl-1H-benzimidazol-2-yl)benzene (TPBi) doping on electroluminescent properties of poly[N,N'-bis(4-butylphenyl)-N,N'-bis(phenyl)benzidine] (poly-TPD) was investigated. A series of organic light-emitting devices (OLEDs) integrated with (i) single-layer poly-TPD, (ii) blended single-layer poly-TPD:TPBi or (iii) bilayer poly-TPD/TPBi were fabricated and characterized. An excimer emission band at 500 nm was found in the poly-TPD film, poly-TPD:TPBi (1:1) blend film, and poly-TPD/TPBi bilayer film. It was observed that the planar geometry of poly-TPD was related to the formation of excimers. The electromer emission, which was absent in photoluminescence, was investigated by applying an external electrical field to devices with non-doped and TPBi-doped poly-TPD. Only the electromer emission was observed in the devices with TPBi-doped poly-TPD, due to the impeded intrinsic and excimer emissions. The planar geometry of poly-TPD molecules may be destroyed due to the longer inter-ion distance with the doping of TPBi. (C) 2015 Published by Elsevier B.V.