Effect of Mg doping on Cu2ZnSnS4 solar cells prepared by DMF-based solution method

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.

Automated summary

In this study, magnesium was successfully introduced into CZTS to prepare CZMTS solar cells. The results show that Mg doping can improve the electronic properties and microstructure of CZTS absorbers, leading to enhanced performance. The positive effects of Mg doping on improving the performance of CZTS solar cells are attributed to improved crystal quality, reduced defects, and increased external quantum efficiency.