文献类型：期刊文献

英文题名：Carbazole-modified blue light-emitting copolymers with the backbones integrated by diphenyloxadiazole, fluorene, and triphenylamine

作者：Lin, Ying[1];Chen, Yu[1];Ye, Tengling[2];Ma, Dongge[2];Li, Yongxi[1]

机构：[1]E China Univ Sci & Technol, Inst Appl Chem, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Grad Sch, Changchun 130022, Peoples R China

年份：2012

卷号：48

期号：2

起止页码：416

外文期刊名：EUROPEAN POLYMER JOURNAL

收录：;EI(收录号：20120314694999);WOS:【SCI-EXPANDED(收录号:WOS:000300380300017)】；

基金：The authors are grateful for the financial support of the National Natural Science Foundation of China (21 074 034), Ministry of Education of China (309013), the Fundamental Research Funds for the Central Universities, Shanghai Municipal Educational Commission for the Shuguang fellowship (08GG10, to Y.C.) and the Shanghai Eastern Scholarship(to Y.C.). Ms. Y. Lin would like to thank her parents for instilling in her at an early age the desire to learn and an appreciation of knowledge.

语种：英文

外文关键词：Blue light-emitting polymers; Carbazole; Diphenyloxadiazole; Fluorene; Triphenylamine

摘要：Two new blue light-emitting polymers, poly{[2,5-bis(4-phenylene)-1,3,4-oxadiazole]-[9,9-dihexylfluorene-2,7-diyl]-[N-(4-(9H-carbazol-9-yl)phenyl)-N,N-bis(p-phenylene)aniline]) (POFPA) and poly{[2,5-bis(4-phenylene)-1,3,4-oxadiazole]-[9,9-dihexylfluorene-2,7-diyl] -[4-(3,6-(di-9H-carbazol-9-yl)-9H-carbazol-9-yl)-N,N-bis(p-phenylene)-aniline]} (POFCPA), were synthesized by Suzuki coupling reactions. By GPC analysis against a linear polystyrene standard POFPA and POFCPA were found to have M-n of 1.68 x 10(4) and 3.70 x 10(3), respectively. In contrast to POFPA, the main absorption peak of POFCPA in dilute toluene solution was blue-shifted by Delta lambda = 26 nm owing to its backbone of relatively shorter pi-conjugation length and more carbazole units in side chain. The absolute fluorescence quantum yield (Phi(f)) of POFCPA in dilute toluene solution was determined as 73%, much higher than that of POFPA (Phi(f) approximate to 58.9%) measured under the same conditions. An electroluminescence device based on POFCPA displays a stable blue emission having color coordinates of (0.15, 0.20), a maximum brightness of 4762 cd/m(2), and a maximum current efficiency of 1.79 cd/A. By using this polymer as the host material doped with 1 wt.% 4,4 '-bis[2-(4-(N,N-diphenylamino)phenyl)vinyl]biphenyl, the achieved highest brightness, maximum current efficiency and maximum power efficiency are 13,613 cd/m(2), 3.38 cd/A, and1.84 lm/W. respectively. (C) 2011 Elsevier Ltd. All rights reserved.