“…Also, Zhang et al had theoretically studied the structural, electronic, and optical properties of compounds by varying both cation (Si) and anion (S, Se, and Te) of Cu 2 ZnSiS 4 , Cu 2 ZnSiSe 4 , and Cu 2 ZnSiTe 4 . DFT study regarding the replacement of Zn with Cr, Ti, and V, and doping of Sn with Mo that resulted in compounds such as Cu 2 CrSnS 4 , Cu 2 TiSnS 4 , Cu 2 VSnS 4 , and Cu 2 Zn(Sn x , Mo 1– x ) S 4 was reported by Kistanov et al Experimentally, the Cu 2 CrSnS 4 thin film was fabricated recently using the solution processing technique . It was observed that the addition of Cr suppressed the defect levels of Cu Zn and [2Cu Zn + Sn Zn ] in the absorber.…”