基于准二维钙钛矿的窄线宽红光电致发光器件性能研究  

Performance of Narrow-linewidth Red Emitted Electroluminescent Devices Based on Quasi-two-dimensional Perovskite

作　　者：张云杰 李晓丹 郭晓阳[1] 刘星元[1] ZHANG Yunjie;LI Xiaodan;GUO Xiaoyang;LIU Xingyuan(State Key Laboratory of Luminescence and Applications,Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China;University of Chinese Academy of Sciences,Beijing 100049,China;China Northeast Municipal Engineering Design and Research Institute Co.Ltd.,Changchun 130021,China)

机构地区：[1]中国科学院长春光学精密机械与物理研究所发光学及应用国家重点实验室,吉林长春130033 [2]中国科学院大学,北京100049 [3]中国市政工程东北设计研究总院有限公司,吉林长春130021

出　　处：《发光学报》2024年第8期1211-1218,共8页Chinese Journal of Luminescence

基　　金：吉林省科技发展计划项目(20220201091GX,20230101366JC);长春市科技发展计划项目(23SH06);国家自然科学基金(62175235)。

摘　　要：金属卤化物钙钛矿发光二极管(PeLEDs)具有宽色域和高色纯度,在照明和显示方面有着广阔的应用前景。英国伦敦大学研究团队发表于Scientific Reports的一项开创性研究发现,每天只需暴露在红光下3 min,就能显著缓解视力下降。而钙钛矿的光谱可调性及较高的色纯度都为护眼红光PeLEDs的实现提供了保障。与以往的界面工程、配体工程等不同,本文从结构优化的角度来提升准二维钙钛矿红光PeLEDs的外量子效率(EQE),即结合微腔结构实现线宽更窄的红光电致发光器件。结果表明,将分布式布拉格反射镜(DBR)与PeLEDs相结合,设计并制备的基于微腔结构的高性能PeLEDs在窄化PeLED的电致发光(EL)半高全宽的基础上实现了EQE成倍增长,最大EQE能达到11.26%。相较于同条件下制备的参比器件,具有微腔结构的PeLED器件EL线宽窄化到参比器件的1/3,仅为11 nm。Metal halide perovskite light-emitting diodes(PeLEDs)have wide color gamut and high color purity,with broad application prospects in lighting and displays.A groundbreaking study by a research team at the University of London published in Scientific Reports found that exposure to red light for just 3 minutes a day could significantly alleviate vision decline.The tunability of perovskite’s spectrum and its high color purity provide assurance for the realization of eye-protective red-emitted PeLEDs.Unlike previous interface engineering or ligand engineering methods,this paper proposes a new approach to enhance the external quantum efficiency(EQE)of quasi-two-dimensional perovskite red PeLEDs by combining them with microcavity structures to achieve narrower linewidths in electroluminescent devices.The results show that by integrating distributed Bragg reflectors(DBRs)with PeLEDs,narrow linewidth high-performance PeLEDs based on microcavity structures were designed and fabricated,achieving a doubling of EQE on top of narrowing the electroluminescence(EL)full width at half maximum for microcavity PeLEDs,with a maximum EQE reaching 11.26%.Compared to reference devices prepared under the same conditions,PeLED devices with microcavity structures narrowed their EL linewidth to one-third that of reference devices,only 11 nm.

关 键 词：准二维钙钛矿 分布式布拉格反射镜 红光 电致发光 半高全宽 

分 类 号：TN312.8[电子电信—物理电子学]