In this paper, magnesium was successfully introduced into CZTS using the DMF-based solution method, and CZMTS solar cell was prepared. The effects of Mg doping on the morphology, crystal structure, and electronic properties of the CZTS absorber were investigated in detail. The crystal structure of the CZMTS absorber and the chemical valence states of the other elements (Cu, Zn, Sn, and S) were not changed as shown by XRD, Raman, and XPS analyses. The results show that Mg doping can improve the electronic properties and microstructure of CZTS absorbers, thus enhancing the PCE from 2.91% to 4.10%. This performance enhancement is associated with good crystal quality, reduced cation-disordering defects, and high external quantum efficiency at the longwave region caused less recombination and open circuit voltage loss. Therefore, Mg doping has a positive effect on improving the performance of CZTS solar cells.

本文采用基于DMF的溶液法成功地将镁引入CZTS中，制备了CZMTS太阳能电池。详细研究了Mg掺杂对CZTS吸收体的形貌、晶体结构和电子性质的影响。CZMTS 吸收剂的晶体结构和其他元素（Cu、Zn、Sn 和 S）的化学价态没有改变，如 XRD、拉曼和 XPS 分析所示。结果表明，Mg掺杂可以改善CZTS吸收体的电子性能和微观结构，从而将PCE从2.91%提高到4.10%。这种性能增强与良好的晶体质量、减少的阳离子无序缺陷以及长波区域的高外量子效率相关，导致复合和开路电压损失更少。所以，