A luminescent all-inorganic manganese-bismuth heterometallic Cs₄MnBi₂Cl₁₂ perovskite single crystal has been synthesized with a [BiCl₆]³⁻-[MnCl₆]⁴⁻-[BiCl₆]³⁻ triple-layered two-dimensional structure. Benefit from the effective energy transfer from [BiCl₆]³⁻ octahedron donor to luminescent [MnCl₆]⁴⁻ acceptor, Cs₄MnBi₂Cl₁₂ shows a photoluminescence quantum yield (PLQY) of up to 25.7% (~610 nm), 51-fold higher than the Bi unalloyed CsMnCl₃·2H₂O counterpart. Suggested by the theoretical calculations, Bi and Mn exhibit hybridization in conduction and valence band, which further results in a favorable low activation energy for exciton transfer (~23 meV). By virtue of all-inorganic chemical composition, Cs₄MnBi₂Cl₁₂ exhibits impressive stability toward moisture, light, and heat. Furthermore, Cs₄MnBi₂Cl₁₂ features strong soft X-ray attenuation and bright radiative luminescence under X-ray excitation, which pave a way for its application in medical flat-panel X-ray digital radiography. This work presents a new avenue toward fabrication of function-directed material with tailored photoelectric properties.

合成了具有[BiCl ₆ ] ³ −-[MnCl ₆ ] ⁴ −-[BiCl ₆ ] ³⁻三层二维结构的发光全无机锰铋异金属Cs ₄ MnBi ₂ Cl ₁₂钙钛矿单晶。。受益于从[BiCl有效能量转移₆ ] ^{3 -}八面体供体到发光[的MnCl ₆ ] ^4-受体，铯₄为：MnBi ₂氯₁₂显示出高达25.7％（〜610 nm）的光致发光量子产率（PLQY），比Bi非合金CsMnCl ₃ ·2H ₂ O对应物高51倍。理论计算表明，Bi和Mn在导带和价带中表现出杂化作用，这进一步导致了激子转移的低活化能（〜23 meV）。通过全无机化学组成，Cs ₄ MnBi ₂ Cl ₁₂对水分，光和热表现出令人印象深刻的稳定性。此外，Cs ₄ MnBi ₂ Cl ₁₂其特点是在X射线激发下具有强大的柔和X射线衰减能力和明亮的辐射发光特性，从而为在医疗平板X射线数字射线照相中的应用铺平了道路。这项工作为具有定制光电性能的功能导向材料的制造提供了新途径。