Abstract
Urea-aided solution combustion (SC) method has been employed to generate monoclinic structure-based Dy (III) doped Ba2BiV3O11 nanophosphors. X-ray diffraction (XRD) and the Rietveld refinement techniques confirmed that the developed nanophosphors are crystallized in a monoclinic crystal system with space group as P21/a. The crystallite size was assessed via Scherrer's equation and Williamson-Hall (W–H) plot. SEM and TEM images confirm the agglomerated particle with a non-uniform shape lies in the nano range. An energy dispersive X-ray (EDAX) study is executed to assess various constitute elements and their relative dispersal was analyzed via mapping spectrum. The highly intense emission peak at 577 nm is ascribed to 4F9/2→6H13/2 electronic transition of the Dy3+ ion when energized at 327 nm wavelength. The band gap values for the host matrix and the optimized sample were measured using a DR spectrophotometer. Auzel's model was utilized to establish the values of quantum efficiency (68.21 %), non-radiative rates (597.08 s−1), and intrinsic lifetime (0.7803 ms). Furthermore, PL (photoluminescence) data is exercised to attain chromatic quantities viz. color coordinates (x and y), and correlated color temperature (CCT), which are strongly endorsed for their usage as near UV-based advanced solid-state illuminating devices.
Published Version
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