Estimation of electron mobility of n-doped 4,7-diphenyl-1,10-phenanthroline using space-charge-limited currents  

作　　者：希扎尔.乌尔.哈克 鲁富翰 蒋雪茵 张志林 张小文 张良 李俊 

机构地区：[1]School of Materials Science and Engineering,Shanghai University [2]Key Laboratories of Advanced Display and System Applications,Ministry of Education,Shanghai University

出　　处：《Journal of Semiconductors》2009年第11期63-66,共4页半导体学报（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (Nos.60477014,60577041,60776040,60777018);the National High Technology Research and Development Program of China (No.2008AA03A336)

摘　　要：The electron mobilities of 4, 7-diphenyl-1, 10-phenanthroline （BPhen） doped 8-hydroxyquinolinatolithium （Liq） at various thicknesses （50-300 nm） have been estimated by using space-charge-limited current measurements. It is observed that the electron mobility of 33 wt% Liq doped BPhen approaches its true value when the thickness is more than 200 rim. The electron mobility of 33 wt% Liq doped BPhen at 300 nm is found to be -5.2 × 10^-3 cm^2/（V.s） （at 0.3 MV/cm） with weak dependence on electric field, which is about one order of magnitude higher than that of pristine BPhen （3.4 × 10^-4 cm^2/（V.s）） measured by SCLC. For the typical thickness of organic light-emitting devices, the electron mobility of doped BPhen is also investigated.The electron mobilities of 4, 7-diphenyl-1, 10-phenanthroline （BPhen） doped 8-hydroxyquinolinatolithium （Liq） at various thicknesses （50-300 nm） have been estimated by using space-charge-limited current measurements. It is observed that the electron mobility of 33 wt% Liq doped BPhen approaches its true value when the thickness is more than 200 rim. The electron mobility of 33 wt% Liq doped BPhen at 300 nm is found to be -5.2 × 10^-3 cm^2/（V.s） （at 0.3 MV/cm） with weak dependence on electric field, which is about one order of magnitude higher than that of pristine BPhen （3.4 × 10^-4 cm^2/（V.s）） measured by SCLC. For the typical thickness of organic light-emitting devices, the electron mobility of doped BPhen is also investigated.

关 键 词：DOPING electron mobility SCLC 8-hydroxyquinolinonate-lithium （Liq） 

分 类 号：O441.1[理学—电磁学]