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
张云杰 1李晓丹 2郭晓阳 3刘星元3
作者信息
- 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;中国科学院大学,北京 100049
- 2. 中国市政工程东北设计研究总院有限公司,吉林长春 130021
- 3. 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
- 折叠
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.
Abstract
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 Universi-ty 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 re-alization of eye-protective red-emitted PeLEDs.Unlike previous interface engineering or ligand engineering meth-ods,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 electrolumi-nescent devices.The results show that by integrating distributed Bragg reflectors (DBRs) with PeLEDs,narrow line-width 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 devic-es 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Key words
quasi-two-dimensional perovskite/distributed Bragg mirror/red emitted/electroluminescence/half-height full width引用本文复制引用
基金项目
吉林省科技发展计划(20220201091GX)
吉林省科技发展计划(20230101366JC)
长春市科技发展计划(23SH06)
国家自然科学基金(62175235)
出版年
2024
国家科技期刊平台
NSTL
万方数据