PDF(Pubmed)
Abstract：
Copper-zinc-tin Cu2ZnSn (CZT) thin films are promising materials for solar cell applications. This thin film was deposited on a fluorine-doped tin oxide (FTO) using an electrochemical deposition hierarchy. X-ray diffraction of thin-film studies confirms the variation in the structural orientation of CZT on the FTO surface. As the pH of the solution is increased, the nature of the CZT thin-film aggregate changes from a fern-like leaf CZT dendrite crystal to a disk pattern. The FE-SEM surface micrograph shows the dendrite fern leaf and sharp edge disks. The 2-D diffusion limitation aggregation under slippery conditions for ternary thin films was performed for the first time. The simulation showed that by changing the diffusing species, the sticking probability was responsible for the pH-dependent morphological change. Convincingly, diffusion-limited aggregation (DLA) simulations confirm that the initial structure of copper is responsible for the final structure of the CZT thin films. An experimental simulation with pH as a controlled parameter revealed phase transition in CZT thin films. The top and back contact of Ag-CZT thin films based on Schottky behavior give a better electronic mechanism in superstrate and substrate solar cells.
摘要：
铜-锌-锡Cu2ZnSn（CZT）薄膜是太阳能电池应用的有前途的材料。使用电化学沉积层次将该薄膜沉积在氟掺杂的氧化锡(FTO)上。薄膜研究的X射线衍射证实了FTO表面上CZT结构取向的变化。随着溶液的pH值增加，CZT薄膜聚集体的性质从蕨类植物叶状CZT枝晶晶体变为圆盘状。FE-SEM表面显微照片显示了枝晶蕨类植物叶和锋利的边缘盘。首次在光滑条件下对三元薄膜进行了二维扩散限制聚集。模拟表明，通过改变扩散物种，粘附概率是pH依赖性形态变化的原因。令人信服的是，扩散限制聚集（DLA）模拟证实，铜的初始结构负责CZT薄膜的最终结构。以pH为控制参数的实验模拟揭示了CZT薄膜中的相变。基于肖特基行为的Ag-CZT薄膜的顶部和背面接触在上层和衬底太阳能电池中提供了更好的电子机制。
