文献类型：期刊文献

英文题名：Blue-Light-Emitting Polyfluorene Functionalized with Triphenylamine and Cyanophenylfluorene Bipolar Side Chains

作者：Lin, Ying[1];Ye, Teng Ling[2];Chen, Yu[1];Ma, Dong Ge[2];Chen, Zhi Kuan[3];Dai, Yan Feng[2];Li, Yong Xi[1]

机构：[1]E China Univ Sci & Technol, Key Lab Adv Mat, Inst Appl Chem, Shanghai 200237, Peoples R China;[2]Chinese Acad Sci, State Key Lab Polymer Phys & Chem, Changchun Inst Appl Chem, Changchun 130022, Peoples R China;[3]Inst Mat Res & Engn, Singapore 117602, Singapore

年份：2010

卷号：48

期号：24

起止页码：5930

外文期刊名：JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY

收录：;EI(收录号：20104913456926);WOS:【SCI-EXPANDED(收录号:WOS:000285485700034)】；

基金：The authors are grateful for the financial support of the National Natural Science Foundation of China (20876046, 21074034) Ministry of Education of China (309013), the Fundamental Research Funds for the Central Universities Shanghai Municipal Educational Commission for the Shu guang Fellowship (08GG10) and the Shanghai Eastern Schol arship 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：backbone emission; bipolar side chains; charge transfer copolymerization; cyanophenylfluorene; light emitting diodes (LEDs); PLED polyfluorene synthesis; triphenylamine; UV-vis spectroscopy

摘要：A new bipolar conjugated polyfluorene copolymer with triphenylamine and cyanophenylfluorene as side chains poly{[9 9 di(triphenylamine)fluorene] [9 9 dihexyl fluorene] [2 7 bis(4' cyanophenyl) 9 9' spirobifluorene]} (PTHCF) was synthe sized for studying the polymer backbone emission Its absolute weight average molecular weight was determined as 485 x 10(4) by using gel permeation chromatography with a multiangle light scattering detector In contrast to the electronic absorp non spectrum in dilute solution the absorbance of PTHCF in thin film was slightly blue shifted By comparison of the solu tion and thin film photoluminescence (PL) spectra, a red shift of Delta/ = 8-9 nm was observed in the thin film PL spectrum The HOMO and LUMO energy levels of the resulting polymer were electrochemically estimated as -5 68 and -2 80 eV respectively Under the electric field intensity of 48 x 10(5) V cm(-1) the obtained hole and electron mobilities were 2 41 x 10(-4) and 1 40 x 10(-4) cm(2) V-1 s(-1) respectively An electro luminescence device with configuration of ITO/PEDOT PSS/PTHCF70%+PBD30%/CsF/Ca/Al exhibited a deep blue emission as a result of excitons formed by the charges migrating along the full fluorene main chain The incorporation of the bipolar side chains into the polymer structure prevented the intermolecular interaction of the fluorene moieties balance charge injection/transport and thereby improve the polymer backbone emis sion (C) 2010 Wiley Periodicals Inc J Polym Sci Part A Polym Chem 48 5930-5937 2010