Authors : Khalid Haneen Abass, Anmar Adil and Musaab Khudhur Mohammed
Abstract: In this rsearch, pure tin Sulfide (SnS) and 20 nm Ag nanoparticle-doped SnS (0.002, 0.004 and 0.006 wt.%) thin films are prepared by thermal evaporation technique with thickness of 75 nm. The X-Ray Diffraction (XRD) result showed that, the prepared films are polycrystalline with orthorhombic structure and preferential orientation in the 111 direction. The crystallite size refer to the quantization confinement effect that calculated from Scherer’s formula, it increased with increasing of Ag doping. From Scanning Electron Microscopy (SEM) and Atomic Force Microscopy (AFM), the films morphology and surface roughness were affected by low Ag doping. The optical measurements of the films are studied by UV-visible spectrophotometer in the wavelength range 300-900 nm. The transmittance decreased with the increasing of Ag doping while the absorbance increased. The optical measurement shows that, the films are allowed direct Energy gap (Eg) that decreased from 3-2 eV with increasing of Ag-doping, the values of energy gaps refer to the confinement effect. The electrical properties of the films have been studied and found that the prepared films are p-type and carrier concentration (n) and electrical conductivity (σ) increased with the increasing of Ag doping. I-V characteristics show that, the Ag-doping increases the energy conversion efficiency by retarding the electron-hole recombination and the improved device performance caused by the high short-circuit current (Isc) and open circuit Voltage (Voc) and found that the highest efficiency (η) at doping 0.006 wt.% is 4.42% with (Voc) of 2.5 V (Isc) of 7 mA cm–2 and Fill Factor (F.F) of 0.25 at intensity p =100 mW/cm2 .
Khalid Haneen Abass, Anmar Adil and Musaab Khudhur Mohammed, 2018. Fabrication and Enhancement of SnS:Ag/Si Solar Cell via. Thermal Evaporation Technique. Journal of Engineering and Applied Sciences, 13: 919-925.