1Department of Physics, Yashwantrao Mohite College, Bharati Vidyapeeth University, Pune-411 038, India
2Thin films and Nano-materials Laboratory Department of Physics, Savitribai Phule Pune University, Pune-411 007, India
Online published on 19 April, 2019.
In this work systematic conversion of In2S3 into CuInS2 was studied using ultrasonic spray pyrolysis (USP) system. The ternary compound group of I-III-VI is important for solar cell because In2S3 acts as a buffer layer, while CuInS2 acts as an absorber layer in solar cell. CuInS2 thin films were synthesized by adding certain amounts of copper salt in the solution containing 0.06 M indium chloride and 0.36 M thiourea. In the absence of copper, the above solution forms In2S3. The copper salt added solution was ultrasonically sprayed on a glass substrate kept at 350°C. For synthesis of n-type and p-type CuInS2, copper chloride with concentrations of 0.04 M and 0.06 M was added, respectively, in the solution containing indium chloride and thiourea. These films were characterized by X-ray diffraction (XRD), Raman spectroscopy, UV-Vis spectrophotometer, Hall effect measurement, etc.
In2S3, CuInS2, Ultrasonic spray pyrolysis, Phase transformation
