摘要
铅卤化物钙钛矿纳米晶具有高光致发光量子产率、窄发光半峰宽、可调带隙、高载流子迁移率等优异的光电性能,使其在太阳能电池、发光二极管、激光发射和X射线成像等光电领域均有巨大的应用前景。然而,由于铅卤化物钙钛矿离子化合物的本征特性,其在水分、光照和温度等环境条件下易发生相变或分解而影响其稳定性。稳定性问题已成为限制钙钛矿纳米晶材料商业化应用的最大障碍。近年来,研究人员报道了多种稳定钙钛矿纳米晶的方法,取得了显著成果。本文介绍了钙钛矿结构及其不稳定性的原因,详细概括了利用高分子、无机物、多孔材料,异质结等多种表面包覆策略来稳定卤化物钙钛矿纳米晶的研究进展,并展望了表面包覆的进一步设计思路。
Lead halide perovskite nanocrystals are emerging semiconductor materials in the past decade,exhibiting excellent optoelectronic properties,such as high photoluminescence quantum yield,narrow emission,tunable emission peak position,and high carrier mobility.They show great application prospects in the fields of solar cells,light-emitting diodes,lasers,and X-ray scintillators.However,lead halide perovskite materials easily undergo phase transformation or decomposition under the ambient conditions including water,light,and/or high temperature due to the inherent characteristics of perovskite ionic compounds.Stability is the biggest obstacle limiting the commercialization of perovskite nanocrystals.In recent years,many methods for stabilizing perovskite nanocrystals have been reported.In this review,the structures and the causes of instability of perovskite nanocrystals,as well as the strategies for forming composite materials to stabilize the nanocrystals by surface coating including macromolecule,inorganic matter,porosint,and heterojunction are summarized in detail.Some perspectives about the stabilization of perovskite nanocrystals are also proposed.
作者
何晓雄
周浩
何青泉
潘军
HE Xiao-xiong;ZHOU Hao;HE Qing-quan;PAN Jun(School of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310011, China)
出处
《发光学报》
EI
CAS
CSCD
北大核心
2021年第11期1701-1721,共21页
Chinese Journal of Luminescence
基金
浙江省引进培育领军型创新创业团队(2020R01002)
国家自然科学基金青年科学基金(21805181)资助项目。
关键词
钙钛矿
纳米晶
表面包覆
稳定性
复合材料
perovskite
nanocrystals
surface coating
stability
composite materials
作者简介
何晓雄(1997-),男,浙江金华人,硕士研究生,2019年于长沙理工大学获得学士学位,主要从事铅卤化物钙钛矿量子点光电材料的研究。E-mail:745456051@qq.com;潘军(1984-),男,安徽南陵人,博士,教授,2010年于中国科学技术大学获得博士学位,主要从事光电材料与器件方向的研究。E-mail:panjun0123@zjut.edu.cn;何青泉(1987-),男,河南淮阳人,博士,特聘教授,2016年于上海交通大学获得博士学位,主要从事钙钛矿发光材料与光伏器件的研究。E-mail:qqhe21@zjut.edu.cn。
