半导体光电, 2014, 35 (6): 963, 网络出版: 2014-12-26
加CdS薄层的有机电致磷光白光器件性能的优化
Performance Optimizaition of White POLEDs with CdS Thin Layer
CdS薄层 有机电致磷光白光器件 电子注入 CdS thin layer phosphorescent white organic light-emitting device electron injection
摘要
采用CBP和MCP做主体, 分别掺杂磷光铱配合物Ir(piq)2(acac)和FIrpic作为红光发光层和蓝光发光层,研究了红光发光层和蓝光发光层的位置对器件性能的影响, 得出结构为 ITO/2T/NPB/MCP∶Firpic/CBP/CBP∶Ir(piq)2(acac)/Bphen/CdS/ LiF/Al的器件性能较好。当CdS的厚度为0.1nm, 电流密度为161mA/cm2时, 器件的最大效率比不加CdS的器件的最大效率提高了1.42倍。亮度也有较大提高。在电流密度为225mA/cm2(电压为17.5V)时, 最大亮度为20890cd/m2,比不加CdS的器件的最大亮度16610cd/m2高出4280cd/m2。
Abstract
Using CBP and MCP as the main body and doping Ir(piq)2(acac) and (FIrpic) respectively as the red light emitting layer and the blue light emitting layer, the optimized organic light emitting diodes(OLEDs) with the structure of ITO/2T/NPB/MCP∶Firpic/CBP/CBP∶Ir(piq)2(acac)/Bphen/ LiF/Al were fabricated. It is studied that when the thickness of CdS layer is 0.1nm and the current density is 161mA/cm2, the maximum efficiency of the device is 1.42 times of that without CdS thin layer. And the brightness is improved greatly. When the current density is 225mA/cm2 (the voltage is 17.5V), the maximum brightness of 20890cd/m2 is realized, which is 4280cd/m2 higher than that without CdS layer.
姜文龙, 孙继芳, 路莹, 田小翠, 刘姊君, 张刚, 常喜, 汪津, 丁桂英. 加CdS薄层的有机电致磷光白光器件性能的优化[J]. 半导体光电, 2014, 35(6): 963. JIANG Wenlong, SUN Jifang, LU Ying, TIAN Xiaocui, LIU Zijun, ZHANG Gang, CHANG Xi, WANG Jin, DING Guiyin. Performance Optimizaition of White POLEDs with CdS Thin Layer[J]. Semiconductor Optoelectronics, 2014, 35(6): 963.
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