Effect of temperature in formation of nanocrystal on chemically deposited (Cd-Zn) S: CdCl2; La, Eu films

Results of Photoconductivity (PC) and Photovoltaic (PV) studies for (Cd-Zn)S: CdCl2;La,Eu films presented in different temperature of depositions  along with Thiophenol (TP) and Poly Vinyl Chloride (PVC) using as a capping agent. Films have been characterized using Photoconductivity excitation spectra, optical absorption, Photoluminescence (PL), X-ray diffraction (XRD) and Scanning Electron Microscope (SEM).  The band gap of such films is evaluated by Photoconductivity excitation spectra and optical absorption. The direct optical band gap of such films was found in the range 2.74-3.04 eV for different deposition temperature. These changing of band gap suggesting the quantum confinement effect in the developed nanoscale size of the particles. The PL spectra of both films nanoparticles showed emission peaks at 436nm, 461nm, 480nm, 504nm and 536nm respectively. SEM micrograph shows the morphological structure and better growth conduction in presence of capping agent at low temperature deposition. Results of XRD studies are associated to different prominent lines of CdS and ZnS. Both studies represent average particle sizes of the order 5.49 – 9.125Å.