高效多共振型热激活延迟荧光蓝色有机发光器件  

Efficient blue organic light-emitting device based on multi-resonance thermally activated delayed fluorescence

作　　者：于紫薇 王菲 步小康[1,2] 张祎铂 宋文博 董贺 柴源 汪津[1,2,3] 杨小天[1,2,3] YU Zi-wei;WANG Fei;BU Xiao-kang;ZHANG Yi-bo;SONG Wen-bo;DONG He;CHAI Yuan;WANG Jin;YANG Xiao-tian(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;Jilin Province Key Laboratory of Wide Band Gap Semiconductor Material Growth and Device Application,Jilin Normal University,Changchun 130103,China)

机构地区：[1]吉林师范大学信息技术学院,吉林四平136000 [2]吉林师范大学吉林省光电子材料与器件工程研究中心,吉林四平136000 [3]吉林师范大学吉林省宽禁带半导体材料生长与器件应用重点实验室,吉林长春130103

出　　处：《吉林师范大学学报(自然科学版)》2025年第2期89-94,共6页Journal of Jilin Normal University:Natural Science Edition

基　　金：国家自然科学基金项目(62374073);吉林省科技发展计划项目(20220101041JC,20220101125JC)。

摘　　要：制备高性能蓝色有机发光二极管(OLEDs)一直是一项艰巨的挑战.本文采用MR-TADF有机发光材料t-DABNA作为掺杂客体,双极性传输材料26DCzPPy作为主体,制备了蓝光有机电致发光器件.当t-DABNA掺杂质量分数为3%时,器件的发光峰位于466 nm,半峰宽为29 nm.此外,在器件结构中引入深最高占据分子轨道(HOMO)能级(-6.9 eV)的空穴阻挡层DPEPO后,器件最大外量子效率可达到11.37%,与未引入空穴阻挡层的器件(6.46%)相比提高了76%.器件性能的提高一方面得益于双极传输主体可以促进器件载流子传输平衡性,另一方面阻挡层的引入能够有效阻止空穴向电子传输层扩散,提高发光层内激子复合率.这一结果为实现高性能蓝色有机发光器件提供了有效的途径.The preparation of high performance blue organic light-emitting diodes(OLEDs)has been a great challenge for a long time.Here,the high performance blue OLEDs based on MR-TADF material t-DABNA as guest and bipolar material 26DCzPPy as host were prepared.The emission peak of the device is 466 nm and the full-width at half-maximum(FWHM)is 29 nm at 3%t-DABNA doping.Moreover,when the deep highest occupied molecular orbital(HOMO)energy level material DPEPO is introduced in device as hole blocking layer,the maximum external quantum efficiency of the device is 11.37%,which is 76% higher than that of the device without the hole blocking layer(6.46%).The improvement of device performances is attributed to two aspects.On the one hand,bipolar host is beneficial to improve the carrier balance of the device.On the other hand,the introduction of hole blocking layer can effectively prevent the diffusion of holes from emitting layer to electron transport layer,and improve the exciton recombination rate.This result provides an effective strategy for realizing high-performance blue OLEDs.

关 键 词：有机电致发光器件 蓝光发射 多共振型热激活延迟荧光 

分 类 号：TN383[电子电信—物理电子学]