闪烁体
材料科学
钙钛矿(结构)
光电子学
共发射极
有源矩阵
光学
纳米技术
探测器
物理
化学
结晶学
薄膜晶体管
图层(电子)
作者
Fei Cao,Dejian Yu,Wenbo Ma,Xiaobao Xu,Bo Cai,Yang Michael Yang,Sinan Liu,Lunhua He,Yubin Ke,Si Lan,Kwang‐Leong Choy,Haibo Zeng
出处
期刊:ACS Nano
[American Chemical Society]
日期:2019-11-27
卷期号:14 (5): 5183-5193
被引量:205
标识
DOI:10.1021/acsnano.9b06114
摘要
Halide perovskite (HP) nanocrystals (NCs) have recently shown great potential for X-ray detection and imaging. However, the practical application still has a long way to go with many technical requirements waiting to be fulfilled, including structure optimization, stability enhancement, and cost reduction. A design principle in this beginning stage is urgently needed but still lacking. Herein, with an “emitter-in-matrix” principle refined from commercial scintillators, CsPbBr3@Cs4PbBr6 with emissive CsPbBr3 NCs embedded inside a solid-state Cs4PbBr6 host is subjected to X-ray sensing and imaging. The Cs4PbBr6 matrix not only enhances the attenuation of X-rays but also dramatically improves the stability of CsPbBr3 NCs. A favorable optical design with the Cs4PbBr6 matrix being transparent to the emission from CsPbBr3 NCs enables efficient light output. As a result, stable and sensitive scintillation response to X-ray signals is demonstrated with superior linearity and ultrahigh time resolution. In order to show the huge potential for practical applications, X-ray imaging using a large-area film (360 mm × 240 mm) by the blade-coating technique is carried out to obtain a high-quality image of interior structures invisible to the human eye. In addition to the above advantages in optics, CsPbBr3@Cs4PbBr6 also enjoys facile solution synthesis with large scalability, excellent repeatability, and low cost.
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