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 [2]Key Laboratory for Organic Electronics & Information Displays (KLOEID),Institute of Advanced Materials (IAM),Nanjing University of Posts & Telecommunications [3]Shandong Kangjieli Artificial Stone Co.,Ltd.

出　　处：《Science China Chemistry》2013年第9期1221-1227,共7页中国科学（化学英文版）

基　　金：the National Natural Science Foundation of China (51273053, 21104012, 21284034 and 61106017);the Natural Science Foundation of Zhejiang Province (Y4110331);the Program for Changjiang Scholars and Innovative Research Teams in Chinese Universities (IRT 1231);the Project of Zhejiang Key Scientific and Technological Innovation Team (2010R50017)

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%, 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/m 2 and 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/m 2 and a high peak efficiency of 2.11 cd/A.

关 键 词：aggregation-induced emission tetraphenylethene polymer ELECTROLUMINESCENCE light-emitting diodes 

分 类 号：O631.3[理学—高分子化学]