Red fluorescent siloles with aggregation-enhanced emission characteristics  

作　　者：Bin Chen Han Nie Rongrong Hu Anjun Qin Zujin Zhao Ben-Zhong Tang 

机构地区：[1]State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China [2]Department of Chemistry, Hong Kong University of Science & Technology, Kowloon, Hong Kong, China [3]Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, Hong Kong, China

出　　处：《Science China Chemistry》2016年第6期699-706,711+706,共8页中国科学（化学英文版）

基　　金：supported by the National Natural Sci-ence Foundation of China (51273053);the National Basic Research Program of China (2015CB655004,2013CB834702);the Guangdong Natural Science Funds for Distinguished Young Scholar (2014A 030306035);the Guangdong Innovative R esearch Team Program o f China (201101C0105067115);ITC-CN ERC14S01;the Fundam ental Research Funds for the Central Univer- sities (2015PT020, 2015ZY013)

摘　　要：A series of new red fluorescent siloles consisting of a silole core and dimesitylboranyl substituent connected with a furan, thiophene, and selenophene bridges were synthesized and characterized. The optical properties, electronic structures, and electroluminescence （EL） performances were investigated. The emission wavelengths were red-shifted from the siloles with furan, to those with thiophene, and then selenophene. The thiophene, and selenophene-containing siloles, （MesB）2DTTPS, and （MesB）zDSTPS, showed the typical aggregation-enhanced emission （AEE） feature, while furan-containing one, （MesB）2DFTPS, showed slight emission decrease as the aggregate formation. Theoretical calculations were carried out to explain the difference in the optical properties. Undoped OLEDs using these red siloles as light-emitting layers were fabricated. The device of （MesB）2DTTPS exhibited the best performance. It radiated red EL emission at 589 nm, and afforded good maximum luminance, current, power, and external quantum efficiency of 13300 cd m^-2, 4.3 cd A^-1, 2.9 lm W^-1, and 1.8%, respectively.Aseries of new red fluorescent siloles consisting of a silole core and dimesitylboranyl substituent connected with a furan,thiophene,and selenophene bridges were synthesized and characterized.The optical properties,electronic structures,and electroluminescence (EL) performances were investigated.The emission wavelengths were red-shifted from the siloles with furan,to those with thiophene,and then selenophene.The thiophene,and selenophene-containing siloles,(MesB)_2DTTPS,and(MesB)_2DSTPS,showed the typical aggregation-enhanced emission (AEE) feature,while furan-containingone,(MesB)_2DFTPS,showed slight emission decrease as the aggregate formation.Theoretical calculations were carried out to explain the difference in the optical properties.Undoped OLEDs using these red siloles as light-emitting layers were fabricated.The device of (MesB)_2DTTPS exhibited the bestper formance.It radiated red ELemission at 589 nm,and afforded good maximum luminance,current,power,and external quantum efficiency of13300cdm^(-2),4.3cd A^(-1),2.9 lmW^(-1),and1.8%,respectively.

关 键 词：SILOLE ORGANOBORON aggregation-enhanced emission red fluorescence organic light-emitting diodes 

分 类 号：TQ422[化学工程] O626[理学—有机化学]