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Volume 46 All articles Published: 19 May 2023 Article ID 0101
POONAM DEVI PRIYANKA SEHRAWAT HINA DALAL MONIKA SHEORAN NEERAJ SEHRAWAT RAJNI DUA R K MALIK
A homogenous crystalline Ca$_9$Y(VO$_4$)$_7$:Sm$^{3+}$ 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 ${}^5$G$_{5/2}$ ${\rightarrow}$ ${}^6$H$_{7/2}$ transition, and $E_g$ (bandgap) values for Ca$_9$Y(VO$_4$)$_7$ (3.74 eV) and Ca$_9$Y$_{0.9}$Sm$_{0.1}$(VO$_4$)$_7$ (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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Bulletin of Materials Science
Volume 46, 2023
All articles
Continuous Article Publishing mode
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Dr Shanti Swarup Bhatnagar for Science and Technology
Posted on October 12, 2020Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
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