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However, this type of detector still faces two major challenges, including low sensitivity due to limited carrier transport efficiency and operational instability caused by ionic migration. Here, a polar lead\u2010free aromatic double perovskite, (TFMPEA)\n                    <jats:sub>4<\/jats:sub>\n                    AgBiI\n                    <jats:sub>8<\/jats:sub>\n                    (\n                    <jats:bold>2<\/jats:bold>\n                    , TFMPEA is 2\u2010(4\u2010trifluoromethyl\u2010phenyl)\u2010ethylamine) is reported, where Ag\u207a\/Bi\n                    <jats:sup>3<\/jats:sup>\n                    \u207a bimetallic co\u2010occupation and interlayer multiple interactions enable highly sensitive and stable X\u2010ray detection. In detail, bimetallic co\u2010occupation narrows the bandgap and flattens the inorganic framework arrangement, achieving a self\u2010driven sensitivity of 184 \u00b5C Gy\n                    <jats:sub>air<\/jats:sub>\n                    <jats:sup>\u22121<\/jats:sup>\n                    cm\n                    <jats:sup>\u22122<\/jats:sup>\n                    . Notably, the compound\n                    <jats:bold>2<\/jats:bold>\n                    exhibits a sensitivity of up to 9191 \u00b5C Gy\n                    <jats:sub>air<\/jats:sub>\n                    <jats:sup>\u22121<\/jats:sup>\n                    cm\n                    <jats:sup>\u22122<\/jats:sup>\n                    at 1100\u00a0V cm\n                    <jats:sup>\u22121<\/jats:sup>\n                    , surpassing most reported X\u2010ray detectors. More importantly, the device exhibits excellent environmental stability due to multiple interlayer interactions. Even after prolonged exposure to air, the photocurrent density does not decrease significantly. This work first reports highly stable and sensitive X\u2010ray detection via bimetallic co\u2010occupation and interlayer interactions, offering insights into green perovskite optoelectronic devices.\n                  <\/jats:p>","DOI":"10.1002\/adma.202511539","type":"journal-article","created":{"date-parts":[[2025,11,3]],"date-time":"2025-11-03T06:43:21Z","timestamp":1762152201000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":11,"title":["Bimetallic Co\u2010Occupation and Multiple Interlayer Interactions in Aromatic Double Perovskite for Highly Sensitive and Stable Self\u2010Driven X\u2010Ray Detection"],"prefix":"10.1002","volume":"38","author":[{"given":"Hang","family":"Li","sequence":"first","affiliation":[{"name":"State Key Laboratory of Functional Crystals and Devices Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences  Fuzhou Fujian 350002 P. R. 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