Improved Blue-Green Electrophosphorescence from a Tuning Iridium Complex with Benzyl Group in Polymer Light-Emitting Devices
MA Xiao-Yun1, ZHU Ke-Ming1, WANG Lei3 , XIAO Fang-Liang1, WEN Zhong-Lin1, ZHU Mei-Xiang1, ZHU Wei-Guo 1,2
1College of Chemistry, Xiangtan University, Xiangtan 4111052Key Lab of Environment-Friendly Chemistry and Application of the Ministry of Education, Xiangtan University, Xiangtan 4111053Institute of Polymer Optoelectronics Materials and Devices, South China University of Technology, Guangzhou 510640
Improved Blue-Green Electrophosphorescence from a Tuning Iridium Complex with Benzyl Group in Polymer Light-Emitting Devices
MA Xiao-Yun1;ZHU Ke-Ming1;WANG Lei3 ;XIAO Fang-Liang1;WEN Zhong-Lin1;ZHU Mei-Xiang1;ZHU Wei-Guo 1,2
1College of Chemistry, Xiangtan University, Xiangtan 4111052Key Lab of Environment-Friendly Chemistry and Application of the Ministry of Education, Xiangtan University, Xiangtan 4111053Institute of Polymer Optoelectronics Materials and Devices, South China University of Technology, Guangzhou 510640
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 521nm and a shoulder at 492nm was observed. The highest luminance efficiency of 4.8cd/A at current density of 0.56mA/cm2 and a maximum luminance of 1944cd/m2 at 217.6mA/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% → 8%. This implies that the concentration quenching of this iridium complex with benzyl group can be efficiently inhibited in the devices.
Abstract：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 521nm and a shoulder at 492nm was observed. The highest luminance efficiency of 4.8cd/A at current density of 0.56mA/cm2 and a maximum luminance of 1944cd/m2 at 217.6mA/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% → 8%. This implies that the concentration quenching of this iridium complex with benzyl group can be efficiently inhibited in the devices.
MA Xiao-Yun;ZHU Ke-Ming;WANG Lei;XIAO Fang-Liang;WEN Zhong-Lin;ZHU Mei-Xiang;ZHU Wei-Guo;. Improved Blue-Green Electrophosphorescence from a Tuning Iridium Complex with Benzyl Group in Polymer Light-Emitting Devices[J]. 中国物理快报, 2008, 25(2): 711-714.
MA Xiao-Yun, ZHU Ke-Ming, WANG Lei, XIAO Fang-Liang, WEN Zhong-Lin, ZHU Mei-Xiang, ZHU Wei-Guo,. Improved Blue-Green Electrophosphorescence from a Tuning Iridium Complex with Benzyl Group in Polymer Light-Emitting Devices. Chin. Phys. Lett., 2008, 25(2): 711-714.
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2008, Vol. 25 
