低效率滚降、色稳定的多发光层结构白色有机磷光电致发光器件  

Low efficiency roll-off and color stability in white phosphorescent organic light-emitting diodes with multiple emission layers

作　　者：汪津[1,2] 江海鹏[1,2] 关宇[1,2] 丁硕 单美玲 王俊东[1,2] 姜文龙 WANG Jin1,2 ,JIANG Hai-peng1,2,GUAN Yu1,2,DING Shuo1,2,SHAN Mei-ling1,2,WANG Jun-dong1,2,JIANG Wen-long1,2(1.Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education,Jilin Normal University, Changchun 130103,China;2.College of Information and Technology,Jilin Normal University, Siping 136000,China)

机构地区：[1]吉林师范大学功能材料物理与化学教育部重点实验室,吉林长春130103 [2]吉林师范大学信息技术学院,吉林四平136000

出　　处：《吉林师范大学学报（自然科学版）》2018年第3期11-15,共5页Journal of Jilin Normal University:Natural Science Edition

基　　金：国家自然科学基金项目(61275047)

摘　　要：采用磷光染料Ir(piq)_3、Ir(ppy)_3和Firpic作为发光染料,制备了低效率滚降、色稳定的多发光层结构白色有机磷光电致发光器件(WOLED).器件的最大电流效率为9.3 cd/A,最大发光亮度为13 380 cd/m^2.当发光亮度增至5 000 cd/m^2时,器件的电流效率为8.7 cd/A,效率仅滚降7.5%.低效率滚降主要源于激子分布区域较宽并且激子被有效限制在发光层.发光亮度从1 144 cd/m^2增加至9 135 cd/m^2,其发光色坐标从(0.366,0.411)变化至(0.365,0.404),变化量仅为(0.001,0.006),为色坐标稳定的白光发射.White phosphorescent organic light-emitting diode（ WOLED） with low efficiency roll-off and color stability was prepared by incorporating Ir（ piq）3,Ir（ ppy）3 and Firpic as phosphorescent emitters. The maximum current efficiency and maximum brightness of the WOLED was 9. 3 cd/A and 13 380 cd/m2,respectively. From the brightness at maximum current efficiency to high brightness of 5 000 cd/m2,WOLED’s current efficiency was 8. 7 cd/A,which efficiency low roll-off was only 7. 5%. The low efficiency roll-off of the WOLED was due to the extended excitons distribution zone and the excitons confined efficiently in emission layers. When the brightness of the WOLED increased from 1 144 to 9 135 cd/m2,the Commission Internationale de L ’Eclairage（ CIE） coordinates varied from（ 0. 366,0. 411） to（ 0. 365,0. 404）,which only changed（ 0. 001,0. 006）.

关 键 词：有机电致发光 发光效率 磷光 滚降 

分 类 号：TN27[电子电信—物理电子学]