Aggregation-enhanced emission and efficient electroluminescence of conjugated polymers containing tetraphenylethene units  

作　　者：HE BaiRong YE ShangHui GUO YanJu CHEN Bin XU XiaoFei QIU HuaYu ZHAO ZuJin 

机构地区：[1]College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 310036, China [2]Key Laboratory for Organic Electronics & Information Displays (KLOEID), Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, Nanjing 210046, China [3]Shandong Kangjieli Artificial Stone Co., Ltd., Jining 272000, China

出　　处：《中国科学：化学》2013年第9期1209-1210,共2页SCIENTIA SINICA Chimica

摘　　要：Tetraphenylethene(TPE)is a popular luminogen characterized by aggregation-induced emission and has been widely used to construct solid-state emissive materials.In this work,two thermally stable polymers(P1 and P2)consisting of TPE conjugated to the 2,7-positions of fluorene and carbazole,respectively,are synthesized and characterized.Both polymers are weakly fluorescent in solutions but show greatly enhanced emission as the aggregate formation,presenting an aggregation-enhanced emission feature.Two kinds of polymer light-emitting diodes are fabricated utilizing P1 and P2 as emitters(EML)(device I:ITO/PEDOT:PSS(45 nm)/PVK:EML(1:1 wt%,55nm)/TPBI(38 nm)/Ca:Ag;device II:ITO/PEDOT:PSS(45 nm)/PVK:OXD-7:EML(3:1:3 wt%,55 nm)/TPBI(38nm)/Ca:Ag).The device II of P2 shows the best performances,affording a maximum luminance of 6500 cd/m2and a high peak efficiency of 2.11 cd/A.Tetraphenylethene （TPE） is a popular luminogen characterized by aggregation-induced emission and has been widely used to construct solid-state emissive materials. In this work, two thermally stable polymers （P1 and P2） consisting of TPE conjugated to the 2,7-positions of fluorene and carbazole, respectively, are synthesized and characterized. Both polymers are weakly fluorescent in solutions but show greatly enhanced emission as the aggregate formation, presenting an aggregation-enhanced emission feature. Two kinds of polymer light-emitting diodes are fabricated utilizing P1 and P2 as emitters （EML） （device I： ITO/PEDOT：PSS （45 nm）/PVK：EML （1：1 wt%, 55 nm）/TPBI （38 nm）/Ca：Ag; device II： ITO/PEDOT：PSS （45 nm）/PVK：OXD-7：EML （3：1：3 wt%, 55 nm）/TPBI （38 nm）/Ca：Ag）. The device II of P2 shows the best performances, affording a maximum luminance of 6500 cd/m2 and a high peak efficiency of 2.11 cd/A.

关 键 词：共轭聚合物 电致发光 聚合物发光二极管 PEDOT 单位 排放 热塑性弹性体 EML 

分 类 号：TN104.3[电子电信—物理电子学]