Structure and Optical Properties of the CdS/Cd2x(CuIn)1- xS2Heterojunction Prepared by Chemical Spray Pyrolysis
IOSR Journal of Engineering
The structural and optical properties of the CdS, Cd 2x (CuIn) 1-x S 2 (CCIS) thin films, at x=0.2,heterojunction were studied in the present paper. The heterojunction films deposited successfully on glass slides using by the spray pyrolysis technique at 623K. The thin films CdS, CCIS and the heterojunction ITO/CdS/CCIS were characterized by using x-ray diffraction. This is to find the polycrystalline series of the CdS, and CCIS solid solution with many phases as a mixture of chalcopyrite and
... chalcopyrite and zinc blend. The CdS, and CCIS thin films have a grain size 35 nm, and 16 nm respectively. The surface morphology was characterized by using atomic force microscopy (AFM) technique. The optical properties of the prepared thin films were investigated by using a UV-VIS spectrophotometer in the wavelength of 300 nm to 1100 nm. The films, ITO, CdS, and CCIS show direct transition with optical energy gap (Eg) values 3.52, 2.42, and 1.7eV respectively. The optical transmission (T),absorption (A) andrefractive index (n) were also discussed . Keywords: The ITO/CdS/Cd 2x (CuIn) 1-x S 2 Structure, Optical, heterojunction and thin films.. I.