器件结构对蓝光TADF-OLED光电性能的影响  

Influence of device structure on photo electric properties of TADF-OLED with blue fluorescence

作　　者：杨凤[1] 杨宇东 YANG Feng;YANG Yudong(College of Chemistry,Sichuan University,Chengdu 610064,China)

机构地区：[1]四川大学化学学院,四川成都610064

出　　处：《实验技术与管理》2021年第3期34-39,44,共7页Experimental Technology and Management

基　　金：2020年四川大学实验技术立项项目(SCU201038);四川省科技计划立项项目(18YYJC1638)。

摘　　要：采用真空热蒸镀法,以热活化延迟荧光(TADF)材料为主体材料、发光材料为客体材料制备混合薄膜发光层,以提高蓝色荧光材料的OLED发光效率。当OLED器件结构为ITO/HAT-CN(5 nm)/TAPC(30 nm)/TCTA(10 nm)/Blue-Or:DMAC-DPS(30%,30 nm)/DPEPO(10 nm)/Bphen(30 nm)/LiF(1 nm)/Al(70 nm)时,器件的光电性能最佳。此蓝光TADF-OLED器件的外量子效率为12.39%,电流效率为21.68 cd/A,功率效率为19.44 lm/W。研究发现改变TADF-OLED的掺杂主体材料和添加空穴注入层均可有效地提高器件的光电特性。实验内容与该领域的前沿科学研究相结合,OLED器件的光电性能稳定、实验现象显著,适于引入本科实验课程。通过该综合实验学生可以夯实实验基础、了解研究热点、掌握最新的科研动态。In order to improve the OLED luminous efficiency of blue fluorescent materials, a hybrid thin film luminescent layer is prepared by using the vacuum thermal evaporation method with thermally activated delayed fluorescence(TADF) material as the main material and luminescent material as the guest material. When the OLED structure is ITO/HAT-CN(5 nm)/TAPC(30 nm)/TCTA(10 nm)/Blue-Or:DMAC-DPS(30%,30 nm)/DPEPO(10 nm)/Bphen(30 nm)/LiF(1 nm)/Al(70 nm), the performance of optoelectronic devices is the best. The external quantum efficiency, current efficiency and power efficiency of the blue TADF-OLED are 12.39%, 21.68 CD/A and 19.44 LM/W respectively. It is found that the photoelectric characteristics of TADF-OLED can be improved by changing the doping material and adding hole injection layer. With the combination of the experimental content and the frontier scientific research in this field, the photoelectric performance of OLED devices is stable and the experimental phenomenon is remarkable, which is suitable for the introduction of undergraduate experimental courses. Through the comprehensive experiment, students can lay a solid foundation for the experiment, understand the research hot spots, and know the latest scientific research trends.

关 键 词：热活化延迟荧光材料 TADF-OLED 光电性能 实验教学 

分 类 号：O6-33[理学—化学] G642.0[文化科学—高等教育学]