Journal of Synthetic Crystals, Volume. 54, Issue 7, 1272(2025)

High-Efficiency X-Ray Detection of Layered Perovskite Single Crystals Based on Ruddlesden-Popper (RP)-Type CHA2PbBr4

Luying ZHENG1,2, Fang WANG1,2, Xieming XU1,3, Shuaihua WANG1、*, and Shaofan WU1
Author Affiliations
  • 1Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou 350002,China
  • 2College of Chemistry and Materials,Fujian Normal University,Fuzhou 350117,China
  • 3Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China,Fuzhou 350108,China
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    Semiconductor radiation detection materials, as core components of X-ray imaging technology, have been widely applied in medical imaging and industrial inspection. In recent years, three-dimensional (3D) perovskite materials have been demonstrated significant potential in semiconductor radiation detection due to their high atomic number, strong photoelectric conversion efficiency, and low fabrication cost. However, challenges for the materials, such as severe ionic migration-induced high dark current and instability, critically hinder their practical device applications. In this study, based on structural dimensionality modulation strategy, cyclohexylamine (CHA) was introduced to slice the 3D halogen-lead skeleton and to form layered perovskites CHA2PbBr4, achieving highly efficient and stable X-ray detection. Millimeter-sized CHA2PbBr4 single crystals were synthesized via a optimize-cooling solvothermal method, exhibiting with layered morphology with orientated growth. Benefiting from the suppressed ionic migration and dark current enabled by the layered structure, the CHA2PbBr4 single crystal exhibits a high resistivity of 1.64×1010 Ω·cm, as well as single-crystal device demonstrates a remarkable sensitivity of 3 791.4 μC·Gyair-1·cm-2 under high electric field and an ultra-low detection limit of 84.55 nGyair·s-1. These results demonstrate that layered structural modulation of organic long-chains enables synergistic optimization of multi radiation detection performances, providing a potential candidate for high-performance X-ray detectors.

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    Luying ZHENG, Fang WANG, Xieming XU, Shuaihua WANG, Shaofan WU. High-Efficiency X-Ray Detection of Layered Perovskite Single Crystals Based on Ruddlesden-Popper (RP)-Type CHA2PbBr4[J]. Journal of Synthetic Crystals, 2025, 54(7): 1272

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    Paper Information

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    Received: Apr. 15, 2025

    Accepted: --

    Published Online: Aug. 28, 2025

    The Author Email: Shuaihua WANG (shwang@fjirsm.ac.cn)

    DOI:10.16553/j.cnki.issn1000-985x.2025.0081

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