Fabrication and Characterization of a p-AgO/PSi/n-Si Heterojunction for Solar Cell Applications

Al2O3 NPs/porous silicon/silicon photovoltaic device

Alumina nanoparticles or (Al2O3 NPs) have been prepared by electrolysis method and deposited using drop casting method on glass and porous silicon (PS) substrates as thin films. Electrochemical etching of p-type silicon wafers was used to prepare nanocrystalline porous silicon. The structural and morphological properties of Al2O3 NPs were investigated by XRD, AFM and SEM techniques, respectively. The optical energy band gap of Al2O3 nanostructure (NSs) has been determined from its optical properties and it was around 3.6 eV. TEM has been used to investigate the nanoscale morphology of Al2O3NPs and showed the grains had a spherical shape and it confirmed the nanometric size of the prepared NPs. PS’s XRD pattern revealed that it had a single crystalline structure, whereas it was amorphous for the Al2O3 NSs. The nanometric scale of both Al2O3 NSs and PS was calculated by XRD patterns, it was about 34nm for Al2O3 NPs and about 90 nm for PS. The diffusion effect of the Al2O3NPs on the electrical properties of heterojunctions PS/Si was studied. Photovoltaic characteristics have been reported for Al2O3NPs/PS/Si Photovoltaic device. Ag/Al2O3/PS/Si/Al solar cell parameters were reported the efficiency of solar cell was 11.8% and F.F is 32.08 %. Ag/Al2O3/PS/Si/Al Photodetector heterojunctions have two peaks of response the first one located at 350 nm and the second at 850 nm with maximum responsivity of 0.8A/W.

Preparation of Bismuth Oxide Nanoparticles/PSi/Si hetrojunction by simple chemical method for solar cell applications

This work shows the fabrication of Bi2O3/PSi heterojunction for solar cell applications prepared by simple chemical method. Bi2O3 nanoparticles were deposited on the n-type porous silicon and glass substrates by drop casting method. The structural and optical properties of bismuth oxide thin film were studied by XRD, SEM, UV-VIS and FTIR analysise. XRD investigation showed that the thin film is polycrystalline and the optical properties stated that bismuth oxide thin film has direct optical band gap of 2.5 eV in addition to the study of I-V in dark and under illumination and finally. The results indicate a significant improvement in the properties of porous silicon, and thus an increase in the conversion efficiency, as the calculated efficiency values for (Al/Bi2O3/PSi/Si/Ag) heterojunction.

Fabrication of Solar Cells Using Novel Micro- and Nano-Complexes of Triazole Schiff Base Derivatives

A new asymmetrical Schiff base triazole ligand, (4-(((3-mercapto-5-(naphthalen-1-ylmethyl)-4H-1,2,4-triazol-4-yl)imino)methyl)phenol) (L1), was synthesized and characterized using CHNS elemental analysis and FTIR, UV/Vis, mass, 1H NMR, and 13C NMR spectroscopies. The Schiff base metal complexes of NiL1, PdL1, and AgL1 were synthesized and identified using FTIR, UV/Vis and flame atomic absorption spectroscopies and elemental analysis, as well as magnetic susceptibility and conductivity measurements. NanoL1 and its complexes, nanoNiL1, nanoPdL1, and nanoAgL1, were prepared as compounds using ultrasound. The new nano-complexes were characterized using FTIR, UV/Vis, atomic force microscopy, scanning electron microscope, and XRD measurements. The structural, optical and morphological properties were studied in a solution of DMSO and then precipitated on silicon slides using the drop-casting method to fabricate the solar cells.