DataVXAdvanced Functional MaterialsPaper
journal article·2024-10Open access

Transparent Perovskite Wafers via Nanocrystals Ordered Coalescence Toward Sensitive and Stable X‐Ray Detection and Imaging

Wenyan Tan, Yingrui Xiao, Chao Zhou, Xi Jin, Siyuan Zhu, Mingyue Han, Zhaoheng Tang, Yu Zhang, Zhenhuang Su, Tongsheng Chen, Qi Chen, Qijie Liang, Weiqiang Chen, Yan Jiang

Advanced Functional Materials· Volume 34· Issue 42
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Source abstract

Abstract

Abstract Metal halide perovskite wafers have shown significant potential in large‐area X‐ray detection and imaging. However, a distinct difference in optical transparency between state‐of‐the‐art perovskite wafers and single crystals indicates the inferior crystal quality of perovskite wafers, which limits the performance and stability of wafer‐based X‐ray detectors. Here, nano‐sized MAPbBr 3 powders are utilized to fabricate dense perovskite wafers by low‐temperature hot‐pressing with high transparency above 60% within the 552–800 nm wavelength range. Adjacent nanocrystals assemble following the ordered coalescence mechanism, resulting in the exclusion of nanoscopic pores and crystallographic reorientation. The transparent MAPbBr 3 wafer‐based detectors achieve an impressively high X‐ray sensitivity of 1.14 × 10 5 µC Gy air −1 cm −2 and a low detection limit of 149 nGy air s −1 , which is superior to opaque MAPbBr 3 wafer detectors (5.64 × 10 4 µC Gy air −1 cm −2 and 316.7 nGy air s −1 ) and comparable to MAPbBr 3 single‐crystal detectors. Moreover, the detectors demonstrate high uniformity and outstanding stability under continuous X‐ray irradiation of a total dose of up to 5.9 Gy air , equaling to 29 500 times posteroanterior chest examinations. The high sensitivity and low detection limit of the detectors lead to clear X‐ray imaging performance.
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Research context

NanomaterialsElectronic materials

OpenAlex topics: Perovskite Materials and Applications · Luminescence Properties of Advanced Materials · Radiation Detection and Scintillator Technologies

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

MOE Key Laboratory of Laser Life Science & Guangdong Provincial Key Laboratory of Laser Life Science Guangzhou Key Laboratory of Spectral Analysis and Functional Probes College of Biophotonics South China Normal University Guangzhou 510631 China

School of Materials Science and Engineering Beijing Institute of Technology Beijing 100081 China

Songshan Lake Materials Laboratory Dongguan Guangdong 523429 China

School of Physics and Materials Science Guangzhou University Guangzhou Guangdong 510006 China

Department of Physics Liaoning University Shenyang 110036 China

Department of Materials Science and Engineering Southern University of Science and Technology Shenzhen 518055 China

Shanghai Synchrotron Radiation Facility (SSRF) Shanghai Advanced Research Institute Chinese Academy of Sciences 239 Zhangheng Road Shanghai 201204 China

Funding

National Natural Science Foundation of China · Guangdong Province Higher Vocational Colleges and Schools Pearl River Scholar Funded Scheme · Basic and Applied Basic Research Foundation of Guangdong Province

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