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<p>Two-dimensional (2D) multilayered perovskites are poised to revitalize the field of efficient X-ray detection due to their strong X-ray absorption ability and excellent carrier transport. However, 2D alternating cations intercalation (ACI) type multilayered perovskites, which hold promise as potential X-ray detection materials, still remain largely unexplored in X-ray detection capabilities. Herein, through methylammonium intercalation reorienting aromatic amine cations, an ACI multilayered perovskite (NMA)<sub>3</sub>(MA)<sub>3</sub>Pb<sub>4</sub>I<sub>14</sub> (<b>NMPI</b>, NMA = <i>N</i>-methylbenzylaminium, MA = methylammonium) is successfully constructed for efficient self-driven X-ray detection. Specifically, the reconstructed <b>NMPI</b> has a smoother multilayered inorganic framework with an enhanced mobility-lifetime product compared with the prototype (NMA)<sub>4</sub>Pb<sub>3</sub>I<sub>10</sub>. Notably, based on polar structure-induced radiation photovoltage (1.2 V), <b>NMPI</b> exhibits a high sensitivity of 113.78 μC Gy<sup>−1</sup> cm<sup>−2</sup> and a low detection limit of 162 nGy s<sup>−1</sup> under zero bias. This work first explores sensitive self-driven X-ray detection in ACI-type multilayered perovskite, shedding light on future exploration for high-performance X-ray detection.</p>

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Methylammonium intercalation reorienting aromatic amine cations in 2D multilayered perovskite toward efficient self-driven X-ray detection

  • 期刊论文

  • 发表日期：

    2025年5月27日

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  • Yaru Geng,
  • Qianwen Guan,
  • Ruiqing Li,
  • Huang Ye,
  • Xinling Li,
  • Daohua Wang,
  • Junhua Luo

摘要

Two-dimensional (2D) multilayered perovskites are poised to revitalize the field of efficient X-ray detection due to their strong X-ray absorption ability and excellent carrier transport. However, 2D alternating cations intercalation (ACI) type multilayered perovskites, which hold promise as potential X-ray detection materials, still remain largely unexplored in X-ray detection capabilities. Herein, through methylammonium intercalation reorienting aromatic amine cations, an ACI multilayered perovskite (NMA)3(MA)3Pb4I14 (NMPI, NMA = N-methylbenzylaminium, MA = methylammonium) is successfully constructed for efficient self-driven X-ray detection. Specifically, the reconstructed NMPI has a smoother multilayered inorganic framework with an enhanced mobility-lifetime product compared with the prototype (NMA)4Pb3I10. Notably, based on polar structure-induced radiation photovoltage (1.2 V), NMPI exhibits a high sensitivity of 113.78 μC Gy−1 cm−2 and a low detection limit of 162 nGy s−1 under zero bias. This work first explores sensitive self-driven X-ray detection in ACI-type multilayered perovskite, shedding light on future exploration for high-performance X-ray detection.