Synthesis and characterization of novel red-emitting copolymers containing fluorene,diketopyrrolopyrrole,and phenothiazine units  

作　　者：QIAO Zhi CAO DeRong LIU QiLin WENG JieNa HE ZhiCai HAN ShaoHu PENG JunBiao 

机构地区：[1]School of Chemistry and Chemical Engineering,South China University of Technology,Guangzhou 510640,China [2]Guangzhou Institute of Chemistry,Chinese Academy of Sciences,Guangzhou 510650,China [3]Institute of Polymer Optoelectronic Materials and Devices,South China University of Technology,Guangzhou 510640,China

出　　处：《Science China Chemistry》2009年第12期2038-2042,共5页中国科学（化学英文版）

基　　金：Supported by the National Natural Science Foundation of China (Grant No. 20872038);Science and Technology Planning Project of Guangdong Province, China (Grant No. 2007A010500011);Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20060561024)

摘　　要：A novel three-component copolymer (PFDP), derived from 9,9-dihexylfluorene, diketopyrrolopyrrole( DPP), and 10-octylphenothiazine, was synthesized through palladium-catalyzed Suzuki polycondensation in good yields. PFDP possessed moderate molecular weight and polydispersity, well-defined structure, and excellent thermal properties with an onset decomposition temperature at 357°C. PFDP in thin film exhibited red photoluminescence from DPP chromophore exclusively, with a peak at 602 nm. Electron-rich phenothiazine units sighificantly improved the injection and transport of holes by incorporating into polymer backbone. Light-emitting device was fabricated in the ITO/PEDOT: PSS/PVK/ polymer/Ba/Al configuration using PFDP as the emitting layer. The device based on PFDP showed red emission [CIE coordinate value (0.62, 0.38)] that was close to the standard red (0.66, 0.34). The results on electroluminescent performance revealed that PFDP may be a promising candidate for the red emitter with a maximum brightness of 259 cd/m2 and a maximum external quantum efficiency of 0.25%.A novel three-component copolymer (PFDP),derived from 9,9-dihexylfluorene,diketopyrrolopyrrole(DPP),and 10-octylphenothiazine,was synthesized through palladium-catalyzed Suzuki polycondensation in good yields. PFDP possessed moderate molecular weight and polydispersity,well-defined structure,and excellent thermal properties with an onset decomposition temperature at 357℃. PFDP in thin film exhibited red photoluminescence from DPP chromophore exclusively,with a peak at 602 nm. Electron-rich phenothiazine units sighificantly improved the injection and transport of holes by incorporating into polymer backbone. Light-emitting device was fabricated in the ITO/PEDOT:PSS/PVK/ polymer/Ba/Al configuration using PFDP as the emitting layer. The device based on PFDP showed red emission [CIE coordinate value (0.62,0.38)] that was close to the standard red (0.66,0.34). The results on electroluminescent performance revealed that PFDP may be a promising candidate for the red emitter with a maximum brightness of 259 cd/m2 and a maximum external quantum efficiency of 0.25%.

关 键 词：FLUORENE DIKETOPYRROLOPYRROLE PHENOTHIAZINE ELECTROLUMINESCENCE polymeric LIGHT-EMITTING diodes 

分 类 号：O631.5[理学—高分子化学]