“…A few works on Cu 2 CdSnS 4 (CCTS) quaternary alloys have been reported, many kinds of methods have been used to synthesize Cu 2 CdSnS 4 quaternary alloy, through solvothermal approach under controlled temperatures [13], a combination of successive ionic layer absorption, reaction method and the chemical bath deposition method [14], microwave irradiation method [15], facile synthesis [16], simple solvothermal method [17], spray pyrolysis deposition [18] and co-sputtering deposition [19]. Recently, the electronic and optical properties of Cu 2 ZnSiS 4 and Cu 2 ZnSiSe 4 in wurtzite-kesterite and wurtzite-stannite structures are studied using firstprinciples calculations by Zhang et al [20].…”