A Silole-Based Efficient Electroluminescent Material with Good Electron-Transporting Potential  

作　　者：Changyun QuanI Han Nie Rongrong Hu Anjun Qin Zujin Zhao Ben Zhong Tang 

机构地区：[1]Guangdong Innovative Research Team, State Key Laboratory of Luminescent Materials andDevices, South China University of Technology, Gt4angzhou 510640, China [2]Department of Chemistry, The Hong Kong University of Seience & Technology, Clear Water Bay, Kowloon, Hong Kong, China

出　　处：《Chinese Journal of Chemistry》2015年第8期842-846,共5页中国化学（英文版）

摘　　要：A new silole derivative, 2,5-bis（7-（dimesitylboranyl）-9,9-dimethylfluoren-2-yl）- 1 -methyl- 1,3,4-triphenylsilole （（MesBF）2MTPS）, is synthesized and characterized. （MesBF）2MTPS shows a good fluorescence efficiency of 15% in THF solution and a higher efficiency of 86% in solid film, presenting an aggregation-enhanced emission charac- teristic. It is thermally and morphologically stable, with high decomposition and glass-transition temperatures of 257 and 171 ℃, respectively. The LUMO energy level （-2.96 eV） of （MesBF）zMTPS is lower than that of TPBi, revealing its electron-transporting potential. Efficient organic light-emitting diodes （OLEDs） are fabricated using （MesBF）2MTPS as emitter, which radiates yellow light at 554 nm, and affords high maximum luminance, current efficiency, and external quantum efficiency of 48348 cd·m^-2, 12.3 cd·A^-1, and 4.1%, respectively.A new silole derivative, 2,5-bis（7-（dimesitylboranyl）-9,9-dimethylfluoren-2-yl）- 1 -methyl- 1,3,4-triphenylsilole （（MesBF）2MTPS）, is synthesized and characterized. （MesBF）2MTPS shows a good fluorescence efficiency of 15% in THF solution and a higher efficiency of 86% in solid film, presenting an aggregation-enhanced emission charac- teristic. It is thermally and morphologically stable, with high decomposition and glass-transition temperatures of 257 and 171 ℃, respectively. The LUMO energy level （-2.96 eV） of （MesBF）zMTPS is lower than that of TPBi, revealing its electron-transporting potential. Efficient organic light-emitting diodes （OLEDs） are fabricated using （MesBF）2MTPS as emitter, which radiates yellow light at 554 nm, and affords high maximum luminance, current efficiency, and external quantum efficiency of 48348 cd·m^-2, 12.3 cd·A^-1, and 4.1%, respectively.

关 键 词：SILOLE aggregation-enhanced emission ELECTROLUMINESCENCE electron transporter organic light-emitting diodes 

分 类 号：TN383.1[电子电信—物理电子学] TS205.7[轻工技术与工程—食品科学]