Kuku, TA & Azi, Samuel. (1998). Optical properties of evaporated PbSnS3 thin films. Journal of Materials Science - J MATER SCI. 33. 3193-3196. 10.1023/A:1004364310687. PbSnS3 is a ternary sulfide semiconductor material which has been relatively little studied in the literature. Thin films of this material were deposited on glass substrates by a thermal evaporation process and their optical properties investigated. The optical parameters were determined from the analysis of measured transmission spectra, at normal incidence, from 400–1500 nm, at room temperature. The fundamental absorption edge is placed at 1.04±0.05 eV and is forbidden in nature. Other absorption edges are obtained at 1.44 and 1.55±0.05 eV, with a nearby direct one at 1.68±0.05 eV. The peaks at 1.44 and 1.55 eV have been independently confirmed by the spectral photocurrent response of the films. © 1998 Kluwer Academic Publishers