Improved Blue-Green Electrophosphorescence from a Tuning Iridium Complex with Benzyl Group in Polymer Light-Emitting Devices  

作　　者：马小云 朱克明 王磊 肖方亮 文忠林 朱美香 朱卫国 

机构地区：[1]College of Chemistry, Xiangtan University, Xiangtan 411105 [2]Key Lab of Environment-Friendly Chemistry and Application of the Ministry of Education, Xiangtan University, Xiangtan 411105 [3]Institute of Polymer Optoelectronics Materials and Devices, South China University of Technology, Guangzhou 510640

出　　处：《Chinese Physics Letters》2008年第2期711-714,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant Nos 50473046 and 20272014, the Science Foundation of the Ministry of Education of China under Grant No 204097, the Outstanding Youth Foundation of Hunan Province under Grant No 04JJ1002, the Science Foundation of the Department of Education of Hunan Province under Grant No 03A049, and the Natural Science Foundation of Hunan Province under Grant No 06JJ2008.

摘　　要：Electroluminescence performances from a tuning biscyclometlated iridium complex with benzyl group are demonstrated in double-layered polymer light-emitting devices （PLEDs） using a blend of poly（9,9-dioctylfluorene） and 2-tert-butylphenyl-5-biphenyl-1,3,4-oxadiazole as a host matrix. Blue-green electrophosphorescent emission with a peak at 521 nm and a shoulder at 492nm was observed. The highest luminance efficiency of 4.8cd/A at current density of 0. 56 mA/cm^2 and a maximum luminance of 1944 cd/m^2 at 217.6 mA/cm^2 were achieved in the devices at the dopant concentration of 8%. The luminous performance of the devices becomes better with increasing dopant concentrations from 1% to 8%. This implies that the concentration quenching of this iridium complex with benzyl group can be efficiently inhibited in the devices.Electroluminescence performances from a tuning biscyclometlated iridium complex with benzyl group are demonstrated in double-layered polymer light-emitting devices （PLEDs） using a blend of poly（9,9-dioctylfluorene） and 2-tert-butylphenyl-5-biphenyl-1,3,4-oxadiazole as a host matrix. Blue-green electrophosphorescent emission with a peak at 521 nm and a shoulder at 492nm was observed. The highest luminance efficiency of 4.8cd/A at current density of 0. 56 mA/cm^2 and a maximum luminance of 1944 cd/m^2 at 217.6 mA/cm^2 were achieved in the devices at the dopant concentration of 8%. The luminous performance of the devices becomes better with increasing dopant concentrations from 1% to 8%. This implies that the concentration quenching of this iridium complex with benzyl group can be efficiently inhibited in the devices.

关 键 词：PULSARS x-ray spectra relativity and gravitation REDSHIFT 

分 类 号：O482.31[理学—固体物理]