The optical properties of 2(CdS)X(CuInS2)1-X thin film systems

The optical properties of 2(CdS)X(CuInS2)1-X (CCIS) thin film systems grown by chemical spray pyrolysis on glass slides were studied .The obtained results of X-ray diffraction (XRD) structure analysis were polycrystalline for all values of X= 0,0.1,……0.4 , and have many phases with new phase (CCIS) .The optical characteristics of the prepared thin films have been investigated by UV-VIS spectrophotometer in a wavelength ranging (300-1100) nm . The prepares films have a direct energy gap (Eg) its value varied between (1.4 - 1.8) eV depending on X value . The optical constants such as refractive index (n) ,extinction coefficient (k) ,real and imaginary dielectric constants (ε1 ε2) also discussed .It is found that the prepared films are promising in thin film solar cell.