Effect of Precursor Mixture Composition on the Phase Composition and Electrical Transport Properties of Cu1.85ZnSnS4 and Cu1.5Zn1.15Sn0.85S4 Kesterite Solid Solutions Prepared in Molten KI

We have studied the effect of precursor mixture composition on the phase composition and electrical transport properties of Cu 1.85 ZnSnS 4 and Cu 1.5 Zn 1.15 Sn 0.85 S 4 solid solutions with the kesterite structure, prepared by reacting binary sulfides and sulfur in molten KI, and found conditions for the synthesis of Cu 1.85 ZnSnS 4 and Cu 1.5 Zn 1.15 Sn 0.85 S 4 solid solutions free from inclusions of impurity phases. The Cu 1.5 Zn 1.15 Sn 0.85 S 4 and Cu 1.85 ZnSnS 4 solid solutions have been shown to be p-type semiconductors.