School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798 (Singapore) http://www.ntu.edu.sg/home/hzhang/
Angew Chem Int Ed Engl. 2014 Aug 18;53(34):8929-33. doi: 10.1002/anie.201403655. Epub 2014 Jun 27.
Two-dimensional (2D) copper-based ternary and quaternary semiconductors are promising building blocks for the construction of efficient solution-processed photovoltaic devices at low cost. However, the facile synthesis of such 2D nanoplates with well-defined shape and uniform size remains a challenge. Reported herein is a universal template-mediated method for preparing copper-based ternary and quaternary chalcogenide nanoplates, that is, CuInS2, CuIn(x)Ga(1-x)S2, and Cu2ZnSnS4, by using a pre-synthesized CuS nanoplate as the starting template. The various synthesized nanoplates are monophasic with uniform thickness and lateral size. As a proof of concept, the Cu2ZnSnS4 nanoplates were immobilized on a Mo/glass substrate and used as semiconductor photoelectrode, thus showing stable photoelectrochemical response. The method is general and provides future opportunities for fabrication of cost-effective photovoltaic devices based on 2D semiconductors.
二维（2D）铜基三元和四元半导体是构建高效、低成本溶液处理光伏器件的有前途的构建模块。然而，具有良好定义形状和均匀尺寸的这种 2D 纳米板的容易合成仍然是一个挑战。本文报道了一种通用的模板介导方法，用于制备铜基三元和四元硫属化物纳米板，即 CuInS2、CuIn(x)Ga(1-x)S2 和 Cu2ZnSnS4，使用预先合成的 CuS 纳米板作为起始模板。各种合成的纳米板均具有均匀厚度和横向尺寸的单相性。作为概念验证，将 Cu2ZnSnS4 纳米板固定在 Mo/玻璃基板上并用作半导体光电电极，从而表现出稳定的光电化学响应。该方法具有通用性，为基于 2D 半导体的经济高效光伏器件的制造提供了未来的机会。
