Center for Programmable Materials, School of Materials Science and Engineering, 50 Nanyang Avenue, Singapore, 639798, Singapore.
Angew Chem Int Ed Engl. 2017 Apr 3;56(15):4252-4255. doi: 10.1002/anie.201701134. Epub 2017 Mar 15.
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) PbX (PEA=C H NH , 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.
二维（2D）有机-无机杂化钙钛矿纳米片（NSs）因其独特的性质和广阔的应用前景而受到越来越多的研究关注。在这里，我们首次报道了单原子层和少层自由支撑的苯乙基碘化铅卤化物钙钛矿 NSs 的简便合成方法，即（PEA）PbX（PEA=C6H5CH2NH3+，X=Cl，Br，I）。重要的是，它们的横向尺寸可以通过改变溶剂来调节。此外，这些超薄二维钙钛矿 NSs 表现出高效且可调谐的光致发光性能以及优异的稳定性。我们的研究为二维钙钛矿 NSs 的可控合成提供了一种简单而通用的方法，这可能为它们的基础研究和光电应用开辟了新的途径。
