平衡载流子实现高显色指数、色稳定全荧光白色有机电致发光器件  

Balanced carrier realizing all-fluorescent WOLEDs with high color rendering index and color stability

作　　者：汪津[1,2,3] 李培顶 王旭凤 李佳欣 孟鑫[1,2,3] 柴源 袁曦 华杰[1,2,3] 董贺[1,2,3] WANG Jin;LI Pei-ding;WANG Xu-feng;LI Jia-xin;MENG Xin;CHAI Yuan;YUAN Xi;HUA Jie;DONG He(Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education,Jilin Normal University,Changchun 130103,China;College of Information and Technology,Jilin Normal University,Siping 136000,China;Jilin Engineering Research Center of Optoelectronic Materials and Devices,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 [3]吉林师范大学光电子材料与器件吉林省工程研究中心,吉林四平136000

出　　处：《吉林师范大学学报（自然科学版）》2023年第3期84-88,共5页Journal of Jilin Normal University:Natural Science Edition

基　　金：国家自然科学基金项目(11704152);吉林省科技发展项目(20220101041JC)。

摘　　要：通过平衡载流子传输能够实现白色有机电致发光器件的高显色指数、发光光谱稳定.采用红、绿色TADF材料与蓝色荧光材料作为发光染料,通过单一双极性主体、无间隔层的结构设计方式平衡载流子在发光层中的分布,制备了光谱稳定发射、高显色指数和低效率滚降的全荧光白色有机电致发光器件.三基色全荧光器件最大外量子效率9.5%,白色电致发光光谱稳定,在500~10000 cd/m^(2)范围色坐标从(0.37,0.40)变为(0.35,0.39),显色指数一直维持在81.这为实现色稳定、高效率的白色有机电致发光器件提供了一种有效的途径.High color rendering index and stable luminescence spectra can be achieved by balancing carrier transport in white organic light-emitting diodes(WOLEDs).By balancing the distribution of carriers in the emitting layer by means of a single bipolar body and no interlayer,a full-fluorescent WOLEDs with stable emission,high color rendering index and low efficiency roll-off was prepared using red and green TADF materials and blue fluorescent materials as emitting layer.The maximum external quantum efficiency of the tricolor full-fluorescent device is 9.5%,the white EL spectrum is stable,the CIE changes from(0.37,0.40)to(0.35,0.39)in the range of 500 cd/m^(2)to 10000 cd/m^(2)and the CRI remains at 81.The research provides an effective way to achieve color-stable and high-efficiency WOLEDs.

关 键 词：白色有机电致发光器件 全荧光 热活化延迟荧光 高显色指数 色稳定 

分 类 号：TN27[电子电信—物理电子学]