The first fabrication of low cost Schottky barrier solar cells on chemically deposited polycrystalline n-Sb2S3 thin films is reported. It is observed that in the films deposited with silicotungstic acid and annealed, the Schottky barrier height (phi(b)) of the Au/n-Sb2S3 junctions is considerably improved from 0.54 to 0.76 eV. The ideality factor n decreased from 2.32 to 1.08 and the reverse-saturation current density J0 from 3.2 x 10(-6) to 1.5 x 10(-9) A cm-2. Under AM1 illumination, the improved diode exhibited a conversion efficiency of approximately 3%.