通过后处理诱导的相调控增强铯铜卤化物纳米晶发光二极管性能
Enhanced performance of cesium copper halide nanocrystal light-emitting diodes via post-treatment induced phase regulation
刘文博 1杜雪蓉 1王成成 1卓春雪 1常进 1王娜娜 1李仁志1
作者信息
- 1. Key Laboratory of Flexible Electronics(KLOFE),Institute of Advanced Materials(IAM),School of Flexible Electronics(Future Technologies),Nanjing Tech University,Nanjing 211816,China
- 折叠
摘要
铯铜卤化物由于其高光致发光量子效率(PLQE)和无毒性而引起了越来越多的关注,适用于发光二极管(LED)应用.然而,目前的铜卤化物薄膜制备方法无法同时满足高性能、环保和良好环境适应性的要求.在这里,我们展示了一种简便的方法,其结合了传统的纳米晶方法和前驱体溶液方法的优点.通过使用适当的醇处理Cs3Cu2I5纳米晶薄膜,形成了具有增强的PLQE和改善的能级匹配性的Cs3Cu2I5/CsCu2I3混合维度铜卤化物,将铜卤化物LED的EQE提高到0.8%,处于无铅金属卤化物纳米晶LED的最高效率之一.这项工作为以环境友好方式制备高性能无铅LED提供了新的策略.
Abstract
Cesium copper halides have attracted increasing attention for light-emitting diodes(LEDs)applications due to their high photoluminescence quantum efficiency(PLQE)and non-toxicity.However,the current film fabrication methods for copper halides cannot simultaneously meet the high-performance,eco-friendly,and good environmental tolerance requirements.Here,we demonstrate a facile approach that combines the advantages of both traditional nanocrystal-based methods and precursor solution-based methods.Through treating Cs3Cu2I5 nanocrystal films with proper alcohols,Cs3Cu2I5/CsCu2I3 mixed-dimensional copper halides are formed with enhanced PLQE and improved energy level matching.This enhances the peak EQE of copper halide LEDs to 0.8%,which is among the highest efficiency of lead-free metal halide nanocrystal LEDs.This work provides a new strategy for fabricating high-performance lead-free LEDs in an eco-friendly manner.
关键词
发光二极管/铯铜卤化物/后处理/纳米晶/混合维度Key words
light-emitting diodes/cesium copper halides/post-treatment/nanocrystal/mixed-dimensional引用本文复制引用
基金项目
National Key Research and Development Program of China(2022YFB3602804)
National Natural Science Foundation of China(52233011)
National Natural Science Foundation of China(61974066)
National Natural Science Foundation of China(U21A2078)
出版年
2023
NETL
NSTL
维普
万方数据