Germafluorene conjugated copolymer——synthesis and applications in blue-light-emitting diodes and host materials  

作　　者：CHEN RunFeng ZHU Rui ZHENG Chao LIU ShuJuan FAN QuLi HUANG Wei 

机构地区：[1]Jiangsu Key Laboratory for Organic Electronics and Information Displays,Institute of Advanced Materials,Nanjing University of Posts and Telecommunications,Nanjing 210046,China [2]Institute of Advanced Materials,Fudan University,Shanghai 200433,China

出　　处：《Science China Chemistry》2009年第2期212-218,共7页中国科学（化学英文版）

基　　金：Supported by the National Natural Science Foundation of China (Grant Nos.60325412, 90406021,and 50428303);the Scientific Research Foundation of Nanjing University of Posts and Telecommunications (NUPT) (Grant No. NY206073)

摘　　要：A germafluorene-fluorene copolymer was successfully obtained via Suzuki polymerization.The ger-manium containing copolymer has an efficient blue light emission under the ultraviolet irradiation and its single layer EL device showed the highest brightness of 2630 cd/m2 at 7.8 V and the highest effi-ciency of 0.301 lm/W at 6.2 V.The copolymer can also serve as the host material for phosphorescent metal complexes with the maximum brightness of 15600 cd/m2 and the quantum efficiency of 8.5%.The results are quite promising and promise that as its analogs of fluorene and silafluorene,germafluorene is an excellent building block for blue light-emitting polymers and host materials.A germafluorene-fluorene copolymer was successfully obtained via Suzuki polymerization. The germanium containing copolymer has an efficient blue light emission under the ultraviolet irradiation and its single layer EL device showed the highest brightness of 2630 cd/m2 at 7.8 V and the highest efficiency of 0.301 lm/W at 6.2 V. The copolymer can also serve as the host material for phosphorescent metal complexes with the maximum brightness of 15600 cd/m2 and the quantum efficiency of 8.5%. The results are quite promising and promise that as its analogs of fluorene and silafluorene, germafluorene is an excellent building block for blue light-emitting polymers and host materials.

关 键 词：CONJUGATED POLYMERS germafluorene heteroatom-containing POLYMERS host material LIGHT-EMITTING diodes(LEDs) 

分 类 号：TN312.8[电子电信—物理电子学]