Vanadium Pentoxide and Bismuth Oxide Thin Films Deposition on PSi for Application in Solar Cells
摘要
In this study, V2O5 and Bi2O3 nanoparticles were synthesized using a hydrolysis method and simple chemical method respectively. PSi was prepared by electrochemical etching method. The samples were characterized by X-ray diffraction (XRD), Atomic force microscopy (AFM), Scanning electron microscope (SEM), ultra violet-visible (UV–Vis), Fourier transform infrared (FTIR) and PL emission. From X-ray pattern of PSi, it observed a strong peak of (PSi) at 2θ = 69.04 and 69.24 is confirming the mono-crystalline structure of the Si layer. from AFM of freshly prepared porous silicon found the surface form like hillocks with un-uniform different heights surface. with RMS roughness (Sq): 3.62 nm, Mean roughness (Sa): 2.43 nm and Maximum height (Sz): 61.39. it was a single peak emission at 647 nm was due to PSi nano-crystalline. FTIR spectrum identified the most important functional groups involved in the formation of PSi. The mean crystalline size of V2O5 and Bi2O3 nanoparticles was found to be around (19.70 and 28.57) nm. The morphology of the synthesized V2O5. and Bi2O3 NPs was observed exhibits lamellar structure with diameters 68.08 nm and 32.18 nm respectively. FTIR spectrum identified the most important functional groups involved in the formation of V2O5 and Bi2O3. The optical band gap of V2O5-NPs was found to be 3 eV and Bi2O3 NPs was (4.52 eV). The efficiency of the fabricated solar cell was found to be 1.38% and filling factor 20.62%.