High-efficiency conjugated-polymer-hosted blue phosphorescent light-emitting diodes

作     者：NIU QiaoLi ZHANG Yong WANG YongLi WANG Xin HE Miao 

作者机构：Institute of Optoelectronic Materials and TechnologySouth China Normal UniversityLED Industrial Service Platform of Guangzhou City Guangzhou 510631China 

出 版 物：《Chinese Science Bulletin》 (中国科学通报)

年 卷 期：2012年第57卷第27期

页      面：3639-3643页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070305[理学-高分子化学与物理] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0803[工学-光学工程] 

基　　金：supported by the National Natural Science Foundation of China(10904042 and 61078046) the Key Progam of Chinese Ministry of Education(210157) China Postdoctoral Science Foundation(2012M511584) the Natural Science Foundation of Guangdong Province(8251063101000007 and 10151063101000009) the Scientific and Technological Plan of Guangdong Province(2008B010200004 and 2010B010600030) the Scientific and Technological Plan of Guangzhou City(10U1-D00131) 

主　　题：共轭聚合物 发光二极管 磷光 蓝色 N-乙烯基咔唑 承载 能量水平 发光效率 

摘      要：Highly-efficient blue phosphorescent light-emitting diodes were fabricated based on a conjugated-polymer host by doping bis(2-(4,6-difluorophenyl)-pyridinato-N,C2 ) picolinate(FIrpic) into poly(9,9-dioctylfluorene)(PFO).Previously,conjugated polymers were not considered as potential hosts for blue phosphorescent dyes because of their low-lying triplet energy *** back transfer would occur and lead to poor luminescent efficiency in both photoluminescence(PL) and electroluminescence(EL) ***,by inserting a hole-transporting layer of poly(N-vinylcarbazole)(PVK),the energy back transfer was *** low FIrpic-doping concentrations,PFO emissions were completely quenched;with 8 wt% FIrpic,a maximum luminous efficiency of 11.5 cd/A was achieved.