Low-dimensional halide perovskites (HPs) have received considerable attention in recent years due to their novel physical properties such as compositional flexibility, high quantum yield, quantum size effects and superior charge transport. Here we show room temperature solution synthesis of 1D organic-inorganic lead bromide perovskite microwires (MWs). Our method uses acetone as a reactant, and when CH₃NH₃PbBr₃ is immersed, acetone reacts with CH₃NH₃⁺ cations in the CH₃NH₃PbBr₃ single crystal by the dehydration condensation. The reaction generates a large (CH₃)₂C = NHCH₃⁺ A-site which cannot be accommodated by the cuboctahedron formed by the corner-sharing [PbBr₆]⁴⁻ octahedral, leading to the transition of corner-sharing octahedra to face-sharing triangular prism and the crystal structure transformation from 3D to 1D. The formation process of (CH₃)₂C = NHCH₃PbBr₃ MWs does not involve any ligands, templates or catalysts. A two-terminal memory device was constructed using the (CH₃)₂C = NHCH₃PbBr₃ MWs, showing great potential of the method in fabrication of electronic and optoelectronic devices.

低维卤化物钙钛矿（HPs）近年来因其新颖的物理特性（例如组成柔韧性，高量子产率，量子尺寸效应和出色的电荷传输）而受到了广泛关注。在这里，我们显示了室温溶液合成一维有机-无机溴化铅钙钛矿微丝（MWs）。我们的方法使用丙酮作为反应物，并且当CH ₃ NH ₃ PbBr ₃浸入，用CH丙酮发生反应₃ NH _3个⁺在CH阳离子₃ NH ₃ PbBr ₃通过脱水缩合单晶。反应生成大的（CH ₃）₂C = NHCH ₃ ⁺ A-位，不能由角共享[PbBr ₆ ] ^4-八面体形成的立方八面体容纳，导致角共享八面体过渡到面共享三角棱镜，并且晶体结构从3D到1D。（CH ₃）₂ C = NHCH ₃ PbBr ₃ MWs的形成过程不涉及任何配体，模板或催化剂。使用（CH ₃）₂ C = NHCH ₃ PbBr ₃ MWs构建了一个两端子存储设备，显示了该方法在制造电子和光电设备中的巨大潜力。