Ultra-stable CsPbBr3 Perovskite Nanosheets for X-Ray Imaging Screen

论文摘要

Wet chemistry methods,including hot-injection and precipitation methods,have emerged as major synthetic routes for high-quality perovskite nanocrystals in backlit display and scintillation applications.However,low chemical yield hinders their upscale production for practical use.Meanwhile,the labile nature of halide-based perovskite poses a major challenge for long-term storage of perovskite nanocrystals.Herein,we report a green synthesis at room temperature for gram-scale production of CsPbBr3 nanosheets with minimum use of solvent,saving over 95% of the solvent for the unity mass nanocrystal production.The perovskite colloid exhibits record stability upon long-term storage for up to 8 months,preserving a photoluminescence quantum yield of 63% in solid state.Importantly,the colloidal nanosheets show self-assembly behavior upon slow solidification,generating a crack-free thin film in a large area.The uniform film was then demonstrated as an efficient scintillation screen for X-ray imaging.Our findings bring a scalable tool for synthesis of high-quality perovskite nanocrystals,which may inspire the industrial optoelectronic application of large-area perovskite film.

论文目录

文章来源

类型: 期刊论文

作者: Liangling Wang,Kaifang Fu,Ruijia Sun,Huqiang Lian,Xun Hu,Yuhai Zhang

来源: Nano-Micro Letters 2019年03期

年度: 2019

分类: 工程科技Ⅰ辑

专业: 材料科学

单位: Collaborative Innovation Center of Technology and Equipment for Biological Diagnosis and Therapy in Universities of Shandong, Institute for Advanced Interdisciplinary Research (iAIR), University of Jinan,School of Physics and Technology, University of Jinan,School of Material Science and Engineering, University of Jinan

基金: supported by National Natural Science Foundation of China (Nos. 21805111 and 11405073),Taishan Scholar Fund

分类号: TB383.1

页码: 263-270

总页数: 8

文件大小: 1239K

下载量: 30

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