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

MA Xiao-Yun; ZHU Ke-Ming; WANG Lei; XIAO Fang-Liang; WEN Zhong-Lin; ZHU Mei-Xiang; ZHU Wei-Guo

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

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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-butylpheny1-5-bipheny1-1,3,4-oxadiazole as a host matrix.Blue-green electrophosphorescent emission with a peak at 521 nm and a shoulder at 492 nm was observed.The highest luminance efficiency of 4.8 cd/A at current density of 0.56 mA/cm2 and a maximum luminance of 1944 cd/m2 at 217.6 mA /cm2 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 hnplies that the concentration quenching of this iridium complex With benzyl group can be efficiently inhibited in the devices.

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《中国物理快报：英文版》 |2008年第2期|711-714|共4页
作者
MA Xiao-Yun; ZHU Ke-Ming; WANG Lei; XIAO Fang-Liang; WEN Zhong-Lin; ZHU Mei-Xiang; ZHU Wei-Guo;
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College of Chemistry,Xiangtan University,Xiangtan,411105;

College of Chemistry,Xiangtan University,Xiangtan,411105;

Institute of Polymer Optoelectronics Materials and Devices,South China University of Technology,Guangzhou,510640;

College of Chemistry,Xiangtan University,Xiangtan,411105;

College of Chemistry,Xiangtan University,Xiangtan,411105;

College of Chemistry,Xiangtan University,Xiangtan,411105;

College of Chemistry,Xiangtan University,Xiangtan,411105;

Key Lab of Environment-Friendly Chemistry and Application of the Ministry of Education,Xiangtan University,Xiangtan,411105;

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

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