title: A Ternary Solvent Method for Large-Sized Two-Dimensional Perovskites.
abstract: Recent reports demonstrate that a two-dimensional (2D) structural characteristic can endow perovskites with both remarkable photoelectric conversion efficiency and high stability, but the synthesis of ultrathin 2D perovskites with large sizes by facile solution methods is still a challenge. Reported herein is the controlled growth of 2D (C4H9NH3)2PbBr4perovskites by a chlorobenzene-dimethylformide-acetonitrile ternary solvent method. The critical factors, including solvent volume ratio, crystallization temperature, and solvent polarity on the growth dynamics were systematically studied. Under optimum reaction condition, 2D (C4H9NH3)2PbBr4perovskites, with the largest lateral dimension of up to 40 μm and smallest thickness down to a few nanometers, were fabricated. Furthermore, various iodine doped 2D (C4H9NH3)2PbBrxI4-xperovskites were accessed to tune the optical properties rationally.
authors.affiliation: State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, P.R. China.
authors.forename: Junnian
authors.initials: J
authors.lastname: Chen
authors.affiliation: State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, P.R. China.
authors.forename: Lin
authors.initials: L
authors.lastname: Gan
authors.affiliation: State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, P.R. China.
authors.forename: Fuwei
authors.initials: F
authors.lastname: Zhuge
authors.affiliation: State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, P.R. China.
authors.forename: Huiqiao
authors.initials: H
authors.lastname: Li
authors.affiliation: MIIT Key Laboratory of Advanced Display Materials and Devices, Institute of Optoelectronics & Nanomaterials, College of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, 210094, P.R. China.
authors.forename: Jizhong
authors.initials: J
authors.lastname: Song
authors.affiliation: MIIT Key Laboratory of Advanced Display Materials and Devices, Institute of Optoelectronics & Nanomaterials, College of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, 210094, P.R. China.
authors.forename: Haibo
authors.identifier: 0000-0002-0260-1059
authors.initials: H
authors.lastname: Zeng
authors.affiliation: State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, P.R. China.
authors.forename: Tianyou
authors.initials: T
authors.lastname: Zhai
keywords: crystal growth; perovskites; surface chemistry; synthetic methods; ternary solvents