title: Ultrathin Two-Dimensional Organic-Inorganic Hybrid Perovskite Nanosheets with Bright, Tunable Photoluminescence and High Stability.
abstract: Two-dimensional (2D) organic-inorganic hybrid perovskite nanosheets (NSs) are attracting increasing research interest due to their unique properties and promising applications. Here, for the first time, we report the facile synthesis of single- and few-layer free-standing phenylethylammonium lead halide perovskite NSs, that is, (PEA)2PbX4(PEA=C8H9NH3, X=Cl, Br, I). Importantly, their lateral size can be tuned by changing solvents. Moreover, these ultrathin 2D perovskite NSs exhibit highly efficient and tunable photoluminescence, as well as superior stability. Our study provides a simple and general method for the controlled synthesis of 2D perovskite NSs, which may offer a new avenue for their fundamental studies and optoelectronic applications.
authors.affiliation: Center for Programmable Materials, School of Materials Science and Engineering, 50 Nanyang Avenue, Singapore, 639798, Singapore.
authors.forename: Shuang
authors.identifier: 0000-0002-8244-3002
authors.initials: S
authors.lastname: Yang
authors.affiliation: Center for Programmable Materials, School of Materials Science and Engineering, 50 Nanyang Avenue, Singapore, 639798, Singapore.
authors.forename: Wenxin
authors.initials: W
authors.lastname: Niu
authors.affiliation: Center for Programmable Materials, School of Materials Science and Engineering, 50 Nanyang Avenue, Singapore, 639798, Singapore.
authors.forename: An-Liang
authors.initials: AL
authors.lastname: Wang
authors.affiliation: Center for Programmable Materials, School of Materials Science and Engineering, 50 Nanyang Avenue, Singapore, 639798, Singapore.
authors.forename: Zhanxi
authors.initials: Z
authors.lastname: Fan
authors.affiliation: Center for Programmable Materials, School of Materials Science and Engineering, 50 Nanyang Avenue, Singapore, 639798, Singapore.
authors.forename: Bo
authors.initials: B
authors.lastname: Chen
authors.affiliation: Center for Programmable Materials, School of Materials Science and Engineering, 50 Nanyang Avenue, Singapore, 639798, Singapore.
authors.forename: Chaoliang
authors.initials: C
authors.lastname: Tan
authors.affiliation: Center for Programmable Materials, School of Materials Science and Engineering, 50 Nanyang Avenue, Singapore, 639798, Singapore.
authors.forename: Qipeng
authors.initials: Q
authors.lastname: Lu
authors.affiliation: Center for Programmable Materials, School of Materials Science and Engineering, 50 Nanyang Avenue, Singapore, 639798, Singapore.
authors.forename: Hua
authors.identifier: 0000-0001-9518-740X
authors.initials: H
authors.lastname: Zhang
keywords: organometal halides; perovskites; photoluminescence; stability; two-dimensional nanosheets