Preparation and studies of optical properties characterizations of spray deposited nanostructured FeCdS3thin films

Abstract

In this research FeCdS3 Nano thin films have been prepared on glass substrates using chemical spray pyrolysis method at different substrate temperature (300ºc,400ºc) and molarity ( 0.05 ,0.1, 0.2) mol. The optical properties of prepared films have been investigated . It is found that the transmittance increase as the temperature substrate increase up to (79.44%) at (0.2M). while it decrease when the molarity consentration increase, and reached (83.44%) at (0.05M). absorption coefficient as a foundion of photon energy has been calculated, it is found that (α˃105). The energy gap for allowed direct transition value were between (2.13 – 2.48) eV at temp. (300ºC), and (2.28 – 2.55)eV at temp. (400ºC) .It is found that Eg decrease as the concentration increase with the temp. increasing , and its value was between the energy gap of FeS2 and that of CdS which value between (2.16 -2.4) eV .