Optical Properties of HgCr₂S₄ Thin Film Deposited by Chemical Bath Deposition Method

Thin films of HgCr₂S₄ was prepared for thickness 2670 Å on amorphous glass substrate by chemical bath deposition (CBD) method. The X-ray diffraction analysis of HgCr₂S₄ confirms that deposited thin film was polycrystalline in nature having cubic structure. Compositions of films have been characterized by EDAX analysis. SEM showed that the substrate was well covered with films having some voids. Optical analysis study gives the value of fundamental absorption edge, the intercept lies between 1.6 2 eV, the corresponding absorption coefficient values were 37 × 10⁴ to 41 × 10⁴ and the indirect optical energy band gap for this sample was 2.07 eV.