Preparation and characterization of ZnIn₂S₄ thin film

ZnIn₂S₄ (ZIS) crystalline thin film was prepared by novel spray pyrolysis technique. The as-deposited ZIS film was characterized by X-ray diffraction technique, ultraviolet–visible–near infrared spectroscopy, field emission scanning electron microscopy and energy dispersive analysis by X-rays. X-ray diffraction pattern revealed the crystalline nature of the material. Absorption edge was found to be 471 nm. Direct band gap of the film was calculated and found to be 2·68 eV. The absorption coefficient of the ZIS film exhibits the maximum value of 5·3 × 10⁶ cm⁻¹. The as-deposited ZIS composition was nearly stoichiometric.