在非真空条件下，选用无毒原材料，采用溶液法制备Cu2ZnSnS4薄膜。利用透射电镜、X射线衍射、扫描电镜、能谱以及拉曼等研究手段，对Cu2ZnSnS4薄膜的形成机理进行分析。通过循环伏安及光电测试，探讨Cu2ZnSnS4薄膜作为染料敏化太阳能电池对电极的催化性能。结果表明：采用溶液法制备的Cu2ZnSnS4混合前驱体溶液主要由Cu2SnS3纳米晶和Zn离子组成，将其滴涂成膜后，经过550°C退火，最终可以得到Cu2ZnSnS4薄膜；制备的Cu2ZnSnS4薄膜对氧化还原对I3?/I?具有一定的催化作用，将其应用于染料敏化太阳能电池的对电极取得了1.09%的光电转化效率。
The Cu2ZnSnS4 thin film was prepared by a facile solution method without vacuum environment and toxic substance. The formation mechanism of the film was studied by transmission electron microscopy (TEM), X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), and Raman scattering measurements. Through cyclic voltammetry and photo-electricity tests, the electrocatalytic activity of the prepared film as the counter electrode of dye-sensitized solar cell was also studied. The results show that the mixed precursor solution mainly consists of Cu2SnS3 nanoparticles and Zn ions. After 550 °C annealing process on the precursor film prepared from the mixed solution, Cu2ZnSnS4 thin film is obtained. Besides, it is found that the prepared Cu2ZnSnS4 thin film has the electrocatalytic activity toward the redox reaction of I3?/I? and the dye-sensitized solar cell with the prepared Cu2ZnSnS4 thin film as the counter electrode achieves the efficiency of 1.09%.
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