Abstract
For applications involving LED lighting and displays, phosphor materials with narrow emission bands are quite riveting. CuCrO2 is a well-known delafosste for optoelectronic device applications due to its wide bandgap, and high emission at short wavelengths. Here we tried emission band tuning of CuCrO2 by Ni2+ on 0.5 wt% Mg doped CuCrO2 crystallites. The photoluminescence spectra (PL) are observed when excited with 373 nm radiation, indicating that it had a strong blue emission peak at 423 nm with FWHM of 18.26 nm and good color purity of 91.32%. Rietveld refinement of XRD spectra and Raman investigation conveyed a considerable structural variation with Ni2+ doping and band gap decrement by UV–Vis analysis. In Raman studies, shifting of signature peaks and additional defect-induced peaks are observed, manifesting desired microstructural changes, and the UV–Vis absorption investigation revealed marginal decay of the optical band gap from 3.31 eV to 2.63 eV. Refractive index has also been determined from the UV–Vis analysis and their values substantiate the results.
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