【作者】 王树国； 吴晓明； 华玉林； 冯秀岚； 郑加金； 孙媛媛；

【Author】 WANG Shu-guo, WU Xiao-ming, HUA Yu-lin, FENG Xiu-lan,ZHENG Jia-jin, SUN Yuan-yuan (The Institute of Material Physics, Tianjin University of Technology, Tianjin 300191, China)

【机构】 天津理工学院材料物理研究所； 南开大学现代光学所；

【摘要】 我们利用MEH-PPV为发光材料制备了两种结构电致发光器件:a.ITO/MEH-PPV/Al和b.ITO/MEH-PPV/Ca:Al,分别以金属Al和金属Ca作为器件的背电极。对所制备的两种器件进行测量,发现b组器件比a组器件的发光性能明显提高:起亮电压由10V降低到了5V,量子效率最大值提高了两个数量级,由1.14×10-3%提高到0.17%。最后对器件的发光性能和量子效率提高的原因,从器件载流子注入特性方面进行了分析。更多还原

【Abstract】 We prepared two kinds of OLED devices by spin coating, which have three-layer structures[a:ITO/MEH-PPV/Al] and [b: ITO/MEH-PPV/Ca:Al]. The organic emitting layer is a single layer of polymer aboutMEH-PPV. Al and Ca are used as their cathodes. The quantum efficiency value and luminescent performance ofthe second device was greatly enhanced compaired the first device’s. The quantum efficiency value is provedfrom 1.14×10-3% to 0.17%.Then we can get a conclusion that the Al is better than the Ca as cathode of thedevice.更多还原