Abstract
A homogenous crystalline Ca9Y(VO4)7:Sm3+ nanocrystals emanating reddish-orange light were fabricated via a simple, energy and time-saving solution combustion procedure. Structural examination revealed the trigonal symmetry with the space group R3c(161). Rietveld refinement procedure was adapted to calculate the lattice parameters and refinement factors. Morphological investigations revealed the agglomerated particles in the nano-range. The optical analysis examined a resolved emission peak at 603 nm via 5G5/2 → 6H7/2 transition, and Eg (bandgap) values for Ca9Y(VO4)7 (3.74 eV) and Ca9Y0.9Sm0.1(VO4)7 (3.71 eV) were calculated from DR (diffuse reflectance) spectrum. Furthermore, the colour coordinates (0.5572, 0.3903), radiative lifetime (1.15 ms), quantum efficiency (58.4%) and colour purity (79.49%) were also evaluated in detail. These remarkable results proved the applicability of the targeted nanophosphors for constructing white LEDs, and various other photonic applications.
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Acknowledgements
Poonam Devi thanks the Council of Scientific and Industrial Research (CSIR), New Delhi, India, for its financial support to accomplish this research work via JRF (Award No. 09/382/(11549)/2021-EMR-I).
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Devi, P., Sehrawat, P., Dalal, H. et al. Exploring the orange–red emission from novel vanadate-based nanomaterials for highly innovative photonic applications. Bull Mater Sci 46, 101 (2023). https://doi.org/10.1007/s12034-023-02938-y
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DOI: https://doi.org/10.1007/s12034-023-02938-y