Adekoya Joseph Adeyemi, Khan Malik Dilshad, Revaprasadu Neerish
Department of Chemistry, Covenant University P.M.B. 1023 Ota Ogun State Nigeria
Department of Chemistry, University of Zululand Private Bag X1001 Kwa-Dlangezwa 3880 South Africa
RSC Adv. 2019 Nov 4;9(61):35706-35716. doi: 10.1039/c9ra07376k. eCollection 2019 Oct 31.
Tetragonal CuSnS and orthorhombic CuSnS nanocubes were synthesized by a heat up procedure with oleylamine (OLA) and dodecanethiol (DT) acting as both solvent and capping ligands. Both mohite-anorthic and monoclinic phases were obtained from the same variant of precursors mixture, by hot injection synthesis, at 200 and 250 °C. Changing the reaction conditions also leads to the formation of different morphologies. When OLA was used as a solvent, nanosheets or nanocubes were obtained, while the reaction with DT resulted in the formation of particles in the form of nanohexagons. The growth process of copper tin sulphide starts with the formation of Cu seeds, followed by the oxidation of Sn to Sn. Dodecanethiol was an additional source of sulphur. The overall reaction leads to the formation of either phase pure CuSnS or CuSnS, depending on the reaction conditions, with band-gap energies of 1.05-1.45 eV, which are in the optimum range for photovoltaic applications.
通过升温程序，以油胺（OLA）和十二烷硫醇（DT）作为溶剂和封端配体，合成了四方晶系的CuSnS和正交晶系的CuSnS纳米立方体。通过热注射合成，在200和250°C下，从相同变体的前驱体混合物中获得了莫来石-斜长石相和单斜相。改变反应条件也会导致形成不同的形态。当使用OLA作为溶剂时，获得了纳米片或纳米立方体，而与DT的反应则导致形成纳米六边形形式的颗粒。硫化铜锡的生长过程始于Cu种子的形成，随后Sn氧化为Sn。十二烷硫醇是硫的额外来源。根据反应条件，整体反应导致形成纯相的CuSnS或CuSnS，其带隙能量为1.05 - 1.45 eV，这在光伏应用的最佳范围内。
