Study of doping and annealing effects on thermal properties of SnxSb2Sy (1≤ x≤ 3, 4≤ y≤ 6) sulfosalts thin films by electro-pyroelectric technique

•X-ray diffraction analysis revealed the formation of SnxSb2Sy (1 ≤ x ≤ 3, 4 ≤ y ≤ 6) sulfosalts thin films.•The films have strong diffraction peaks at 2θ = 31.65°, 31.67° and 31.58° for SnSb2S4, Sn2Sb2S5, and Sn3Sb2S6, respectively.•Thermal conductivity values are from 30.4 Wm−1 K−1 to 79.2 Wm−1 K−1.•The thermal diffusivity values are from 4.20 10−6 m2s-1 to 20.5 10−6 m2s-1.•The SnSb2S4 thin film annealed at 200 °C is a good candidate for solar cell application.