Abstract
We have studied here the impact of Al and Ce co-doping in ZnO nanoparticles obtained by sol-gel co-precipitation. Fourier Transform Infrared (FTIR) spectroscopy revealed the presence of ZnO bond in un-doped sample and AlO and CeO bonds were seen in doped and co-doped samples. UV–Vis spectra depicted an absorption dip in UV region and the band gap was seen to decrease on doping and co-doping. The red-shift of the band gap is attributed to the creation of deeper states by doping and co-doping. Photoluminescence (PL) spectra had two major emission peaks at 402 and 428 nm, whose intensities were enhanced by doping and co-doping. Scanning electron microscopy studies indicated spherical morphology of nanoparticles (NPs) in un-doped ZnO, which were transformed to granules and pin-like structures on doping with Al, which became sharper at the edges on subsequent co-doping with Ce.
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