张麦丽,张方辉,张薇,黄晋.白色磷光OLEDs的制备及性能研究[J].光电子激光,2014,(3):425~428 |
白色磷光OLEDs的制备及性能研究 |
Preparation and properties of white phosphorescent OLEDs |
投稿时间:2013-09-11 |
DOI: |
中文关键词: 有机电致发光器件(OLED) 白色磷光,色坐标 |
英文关键词:organic light-emitting device (OLED) white phosphorescence color coordinates |
基金项目:国家自然科学基金(61076066)和陕西省科技统筹创新工程计划(2011KTCQ01-09)资助项目 (陕西科技大学 电气与信息工程学院,陕西 西安 710021) ) |
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中文摘要: |
采用蓝色、黄色磷光混色的发光方式实现白光有机 电致发光器件(OLEDS),其中黄色发光层由红色和绿色磷光材料混 合而成,器件的结构为ITO/MoO3(30nm)/NPB(40nm)/mCP:FIrpic(8%)(50nm)/C BP:R-4B(1%):GIrl(14%)(x nm)/BCP(10nm)/AlQ( 40nm)/LiF(1nm)/Al(100nm) (x=2,3,4,5,6nm)。对器件的效率、亮度等对比发现,当x=5 nm时, 器件的性能最佳,最大亮度为9471 cd/cm2,效率为23.5 cd/A,色 坐标(0.32,0.35)。实验表明,影响器件色稳定性和效率低的原因是电子和空穴迁移随驱 动电压变化响应不一致引发激子复合区域的移动。 |
英文摘要: |
In this paper,white phosphorescent organie light-emitting devices (OLEDs) were prepared with blue phosphorescent layer and yellow phosphorescent layer,and the yellow light-emitting layer is composed of red a nd green phosphorescent materials.The device structure is as follows:ITO/MoO3(30nm)/NPB(40nm)/mCP:FIrpic(8%)(50n m)/CBP:R-4B(1%):GIrl(14%) (5nm)/BCP(10nm)/ AlQ(40nm)/LiF(1nm) /Al(100nm) (x=2,3,4,5,6nm).By comparing the efficiency and brightness of the device,it′s indicated that the device has the best performance when x=5nm.The maximum brightness is 9471 cd/cm2,the maximum current efficiency is 23.5 cd/A,and color coordinates are ( 0.32,0.35).From the experiment, the reason for affecting stable color and low efficiency is the movement of exci ton recombination zone because of the different responses to the drive voltage f or electron and hole mobilities. |
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