Optical properties of sprayed CuInS2 thin layers

In the present study, we attempted to interpret the reflectance and transmittance of sprayed CuInS2 films. We showed that the optical spectral profiles of such material are highly related to the optical scattering of light. Indeed, by taking into account the surface roughness and assuming the layer as an effective medium composed of CuInS2 crystallites with gaseous inclusions, we have practically reproduced R(λ) and T(λ) spectra.