Synthesis and study the optical properties of thin film CdCr2S4 on glass formed by chemical spray pyrolysis

Abstract EN

(CdCr2S4) thin film has grown on cleaned glass substrate at (673k) temperature using spray pyrolysis deposition technique of thickness (430nm) .

UV-VIS.

spectra of the film was studied by using the optical absorbance measurements which were taken in the spectral region from (300-1100)nm .

Optical constants such as optical allowed and forbidden energy band gap of direct transition , absorption coefficient , extinction coefficient and refractive index were evaluated form these spectra.

CdCr2S4 has high value of absorption coefficient (α > 104 cm-1) which conducive to increasing the probability of occurrence direct transitions .Optical allowed band energy for direct transition was (3.325eV) and the forbidden one was (2.61eV) .