Electroluminescence Based on Eu0.5La0.5 (TTA)3phen Doped Poly N-Vinylcarbazole
来源期刊：JOURNAL OF RARE EARTHS2006年第5期
论文作者：Zhang Yuanyuan Liang Chunjun Wang Ruifen Deng Zhenbo Hao Jingang Xu Denghui Cheng Baomei Xiao Jing
Key words：europium complex; electroluminescence; energy transfer; rare earths;
Abstract: A novel rare earth complex Eu0.5La0.5 (TTA)3phen, displaying electroluminescent property, was synthesized,and monolayer and double-layer devices were fabricated by doping it into poly N-vinylcarbazole. The characteristics of these optimized devices were investigated, and the emitting mechanism was explained through the energy band diagram.Optimized double-layer devices with a turn-on voltage of 6.5 V were achieved. At the current density of 68.48 mA· cm- 2,the maximum brightness and the current efficiency of the device reached 238.4 cd·m-2 and 0.35 cd· A-1, respectively.
Zhang Yuanyuan1，Liang Chunjun1，Wang Ruifen2，Deng Zhenbo1，Hao Jingang1，Xu Denghui1，Cheng Baomei1，Xiao Jing1
(1.Institute of Optoelectronic Technology, Beijing Jiaotong University, Beijing 100044, China;
2.Institute of Chemistry and Materials, Hebei Normal University, Shijiazhuang 050016, China)
Abstract:A novel rare earth complex Eu0.5La0.5 (TTA)3phen, displaying electroluminescent property, was synthesized,and monolayer and double-layer devices were fabricated by doping it into poly N-vinylcarbazole. The characteristics of these optimized devices were investigated, and the emitting mechanism was explained through the energy band diagram.Optimized double-layer devices with a turn-on voltage of 6.5 V were achieved. At the current density of 68.48 mA· cm- 2,the maximum brightness and the current efficiency of the device reached 238.4 cd·m-2 and 0.35 cd· A-1, respectively.
Key words:europium complex; electroluminescence; energy transfer; rare earths;
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