Synthesis of halide perovskite microwires via methylammonium cations reaction  

作　　者：Wei Wang Jinhui Gong Siyu Guo Lin Jiang Shaochao Liu Li Wang 

机构地区：[1]Department of Materials Science and Engineering,Nanchang University,Nanchang,330031,China

出　　处：《Frontiers of Materials Science》2020年第3期332-340,共9页材料学前沿（英文版）

基　　金：This work was supported by the National Key Research and Development Program of China (Grant No. 2018YFB0406704);the National Natural Science Foundation of China (Grant No. 61964011);the Natural Science Foundation of Jiangxi Province (Grant Nos. 20165BCB18004 and 20171BCB23005);the Nanchang University Graduate Innovation Special Funding (Grant No. CX2019054).

摘　　要：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.

关 键 词：organic-inorganic halide perovskite one-dimensional MICROWIRE cation reaction memory device 

分 类 号：O62[理学—有机化学]