Synthesis of halide perovskite microwires via methylammonium cations reaction

• Published in: Frontiers of materials science Vol. 14; no. 3; pp. 332 - 340
• Main Authors: WANG, Wei, GONG, Jinhui, GUO, Siyu, JIANG, Lin, LIU, Shaochao, WANG, Li
• Format: Journal Article
• Language: English
• Published: Beijing Higher Education Press 01-09-2020; Springer Nature B.V
• Subjects: Acetone; cation reaction; Cations; Charge transport; Chemistry and Materials Science; Crystal structure; Crystals; Dehydration; Electronic devices; Materials Science; memory device; Memory devices; microwire; one-dimensional; Optoelectronic devices; organic > inorganic halide perovskite; Perovskites; Physical properties; Research Article; Room temperature; Single crystals; Size effects; organic-inorganic halide perovskite; microwire; one-dimensional; cation reaction; memory device
• ISSN: 2095-025X; 2095-0268
• DOI: 10.1007/s11706-020-0515-7

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 CH 3NH 3PbBr 3 is immersed, acetone reacts with CH 3NH 3 + cations in the CH 3NH 3PbBr 3 single crystal by the dehydration condensation. The reaction generates a large (CH 3) 2C=NHCH 3 + A-site which cannot be accommodated by the cuboctahedron formed by the corner-sharing [PbBr 6] 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 (CH 3) 2C=NHCH 3PbBr 3 MWs does not involve any ligands, templates or catalysts. A two-terminal memory device was constructed using the (CH 3) 2C=NHCH 3PbBr 3 MWs, showing great potential of the method in fabrication of electronic and optoelectronic devices.