Abstract Cu2ZnSnS4 (CZTS) thin films prepared by the spray pyrolysis method were studied. This deposition method does not require sophisticated technological setup and allows to easily varying different technological parameters, which is perspective in terms of mass application. Here we show how the variation of the substrate temperature and of the Cu/Zn stoichiometry ratio in the precursor solutions influence the optical and structural properties of CZTS film. The Raman spectra reveal that an increase in the substrate temperature and Cu content leads to a higher disorder of the crystal structure and to the secondary phase formation, in particular, Cu2-xS. In turn, the formation of secondary phases significantly affected the CZTS bandgap. We have found that the films with the substrate temperature 289 °C and the Cu/Zn stoichiometric ratio equal to 2.0 comprise a minimum content of secondary phases and having the best crystal structure.

中文翻译：

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在不同衬底温度和Cu含量下通过喷雾热解获得的Cu 2 ZnSnS 4 薄膜中的第二相

摘要 研究了喷雾热解法制备的Cu2ZnSnS4 (CZTS)薄膜。这种沉积方法不需要复杂的技术设置，并且可以轻松改变不同的技术参数，这是大规模应用的前景。在这里，我们展示了前体溶液中基板温度和 Cu/Zn 化学计量比的变化如何影响 CZTS 薄膜的光学和结构特性。拉曼光谱表明，衬底温度和 Cu 含量的增加导致晶体结构的更高无序性和第二相的形成，特别是 Cu2-xS。反过来，第二相的形成显着影响了 CZTS 带隙。