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Enhanced photoluminescence stability and internal defect evolution of the all-inorganic lead-free CsEuCl3 perovskite nanocrystals

文献类型：期刊论文

作者Gao, Yalei2,3; Zhang, Tao2,3; Liu, Jun2,3; Liu, Hongjun2,3; Li, Meixian2,3; Liu, Fuchi2,3; Kong, Wenjie2,3; Lv, Fengzhen2,3; Yang, Yong1,2,3; Long, Lizhen2,3
刊名PHYSICAL CHEMISTRY CHEMICAL PHYSICS
出版日期2022-08-10
卷号24
ISSN号1463-9076
DOI10.1039/d2cp01374f
通讯作者Liu, Jun(liujun719@163.com) ; Yang, Yong(yyanglab@issp.ac.cn) ; Long, Lizhen(longlzh@foxmail.com)
英文摘要Perovskite materials are prominent candidates for many high-performance optoelectronic devices. The rare-earth lead-free CsEuCl3 perovskite nanocrystals are extremely unstable, which makes it very difficult to study their physicochemical properties and applications. Herein, we improved the stability of rare-earth based CsEuCl3 nanocrystals by employing a silica-coating for the first time. Simultaneously, the naturally formed "hollow" regions with an obviously blue-shifted PL emission were first observed inside the CsEuCl3 nanocrystals during the period of storage. Density functional theory (DFT) calculations showed that the formed "hollow" regions are due to the internal defect evolution in the perovskite lattice, which is also responsible for the increase of the bandgap and the blue-shift of emission. Additionally, the rapid decline of luminescence is probably due to the nanocrystals' final cracking with the expansion of the "hollow" regions. This work helps to understand the relationship between defects and luminescence properties, and provides guidance for the design of more stable lead-free perovskite nanocrystals.
资助项目Natural Science Foundation of Guangxi[AD19245046] ; Natural Science Foundation of Guangxi[AD19245028] ; Natural Science Foundation of Guangxi[2020GXNSFBA297064] ; Natural Science Foundation of Guangxi[2018GXNSFAA294021] ; Natural Science Foundation of Guangxi[2022GXNSFAA035487] ; National Natural Science Foundation of China[11664003] ; National Natural Science Foundation of China[114744285]
WOS研究方向Chemistry ; Physics
语种英语
出版者ROYAL SOC CHEMISTRY
WOS记录号WOS:000834517800001
资助机构Natural Science Foundation of Guangxi ; National Natural Science Foundation of China
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/132145]  
专题中国科学院合肥物质科学研究院
通讯作者Liu, Jun; Yang, Yong; Long, Lizhen
作者单位1.Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China
2.Guangxi Normal Univ, Guangxi Key Lab Nucl Phys & Technol, Guilin 541004, Peoples R China
3.Guangxi Normal Univ, Sch Phys Sci & Technol, Guilin 541004, Peoples R China
推荐引用方式
GB/T 7714		 Gao, Yalei,Zhang, Tao,Liu, Jun,et al. Enhanced photoluminescence stability and internal defect evolution of the all-inorganic lead-free CsEuCl3 perovskite nanocrystals[J]. PHYSICAL CHEMISTRY CHEMICAL PHYSICS,2022,24.
APA Gao, Yalei.,Zhang, Tao.,Liu, Jun.,Liu, Hongjun.,Li, Meixian.,...&Long, Lizhen.(2022).Enhanced photoluminescence stability and internal defect evolution of the all-inorganic lead-free CsEuCl3 perovskite nanocrystals.PHYSICAL CHEMISTRY CHEMICAL PHYSICS,24.
MLA Gao, Yalei,et al."Enhanced photoluminescence stability and internal defect evolution of the all-inorganic lead-free CsEuCl3 perovskite nanocrystals".PHYSICAL CHEMISTRY CHEMICAL PHYSICS 24(2022).

入库方式： OAI收割

来源：合肥物质科学研究院

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