退火时延调控制备高效准二维钙钛矿发光二极管  

Delayed annealing for controlled preparation of highly efficient quasi-2D perovskite light-emitting diodes

作　　者：董贺 魏春雨[1,2] 李培顶 朱燕妮 柴源 华杰[1,2,3] 汪津 DONG He;WEI Chun-yu;LI Pei-ding;ZHU Yan-ni;CHAI Yuan;HUA Jie;WANG Jin(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;Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education,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]吉林师范大学功能材料物理与化学教育部重点实验室,吉林长春130103

出　　处：《吉林师范大学学报（自然科学版）》2024年第3期73-78,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：溶液处理法制备的钙钛矿发光二极管(PeLEDs)具有非常好的商业前景与应用潜力,但在开发具有加工再现性的工艺提升上仍存在挑战.本文提出了一种延迟退火工艺调节钙钛矿薄膜的成核与结晶,有效改善了钙钛矿薄膜表面质量,控制了钙钛矿薄膜表面上的孔洞.结果表明:延迟退火的钙钛矿薄膜拥有更长的载流子寿命,发射峰稳定;器件中可以减少发光层的非辐射复合概率,最大亮度可达到18370 cd/m^(2),最大外量子效率可达12.72%.The perovskite light-emitting diodes(PeLEDs)prepared by solution processing method have great commercial prospects and application potential.However,there are still challenges in developing a process with good reproducibility.In this paper,a delayed annealing process to adjust the nucleation and crystallization of calcium titanium oxide thin films was proposed,which could effectively improve the surface quality of the films and controlling the holes on the surface.The results show that the calcium titanium oxide thin films treated with delayed annealing have longer carrier lifetime and stable emission peak.The non-radiative recombination probability in the emitting layer of the device can be reduced,and the maximum luminance can reach 18370 cd/m^(2)with a maximum external quantum efficiency of 12.72%.

关 键 词：钙钛矿发光二极管 延缓结晶 退火工艺 

分 类 号：TN27[电子电信—物理电子学]