Abstract
Abstract In this work, nickel oxide nanoparticles (NiO NPs) have been synthesized through highly versatile and cost-efficient chemical precipitation process using polyvinylpyrrolidone (PVP) as a surfactant. The X-ray diffraction (XRD), UV–Visible (UV–Vis), Thermogravimetric analysis (TGA), and Fourier transform infrared (FTIR) techniques were employed to characterize the synthesized NiO NPs. The XRD pattern studies revealed that the NiO NPs have a face-centered cubic (FCC) structure and the mean crystallite size of about 7 nm. The optical band gap of 2.88 eV estimated from the tauc plot of thin film UV–vis absorption spectra. FTIR transmission spectra display a prominent band at ∼433 cm−1, which coincides with the bending vibration of Ni–O bond. The prepared NiO NPs retain the prodigious potential as a transparent electrode towards the solar photovoltaic (PV) cell.
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