中国光学2023，Vol.16Issue(1)：202-213,12.DOI:10.37188/CO.2022-0152
紫外偏振敏感的CsPbBr3纳米薄膜的可见光发射
Visible light emission of ultraviolet polarization sensitive CsPbBr3 nano-films
摘要
Abstract
In order to detect polarized ultraviolet light by visible optical elements,CsPbBr3 nanocrystal/metal wire-grid composited films were prepared.The stability of its fluorescence was improved by depositing Al2O3 passivation layer.The green fluorescence of polarization-sensitive perovskite nanocrystals film was obtained under ultraviolet exciting light.The results show that the crystal structure of the CsPbBr3 nanocrys-tals obtained by hot-injection method have a cubic crystal system structure with a square shape and an aver-age size of about 39 nm.An obvious green fluorescence at about 530 nm were observed under ultraviolet light excitation of the nanocrystal colloidal solution.The fluorescence intensity of the CsPbBr3 nanocrystal/metal wire-grid composited film obtained by self-assembly changed periodically with the polariz-ation direction of the excited light.The luminous polarization ratio is about 0.54.The fluorescence intensity of this composite film was enhanced when Al2O3 was deposited on its surface by atomic layer deposition technology.The polarization ratio of the passivated film can still reach 0.36.The above results show that the fluorescence stability and polarization of perovskite nanocrystals film can be optimized by the surface passiv-ation and the introduction of metal wire-grids,respectively.The obtained ultraviolet polarization sensitive CsPbBr3 nanocrystals composited film exhibits important application value in the fields of ultraviolet polariz-ation detection and liquid crystal display.关键词
CsPbBr3纳米晶/表面钝化/荧光增强/偏振Key words
CsPbBr3 nanocrystals/surface passivation/fluorescence enhancement/polarization分类
数理科学引用本文复制引用
吉于今,楚学影,董旭,李金华..紫外偏振敏感的CsPbBr3纳米薄膜的可见光发射[J].中国光学,2023,16(1):202-213,12.基金项目
吉林省科技厅科技发展计划项目(No.20200201266JC)Department of Science and Technology of Jilin Province(No.20200201266JC) （No.20200201266JC）
