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<p>The pure KSrVO<sub>4</sub>[KSV] and Praseodymium doped potassium strontium vanadate [KSV:<i>x</i>Pr<sup>3+</sup> where <i>x</i> = 0.25–3&#xa0;mol%] samples were synthesized by combustion synthesis and various analytical techniques were employed to investigate the structural, surface morphology and spectroscopic properties such as X-ray diffraction, photoluminescence spectroscopy, UV–Vis spectroscopy, high-resolution transmission electron microscopy and scanning electron microscopy. Minor phases of potassium metavanadate KVO<sub>3</sub> (orthorhombic phase) and strontium vanadateSr<sub>3</sub>V<sub>2</sub>O<sub>8</sub> (trigonal phase) along with dominant potassium strontium vanadate KSrVO<sub>4</sub> (orthorhombic phase) were verified by Rietveld refinement analysis. The particle size of ~ 62.54&#xa0;nm was determined by high-resolution transmission electron microscopy analysis and scanning electron microscopy confirmed the phosphor's porous nature. The Kubelka–Munk function was used to compute the band gap of the phosphors which is in the range 3.296 to 3.425&#xa0;eV based on data from diffuse reflectance spectra. When stimulated at 450&#xa0;nm, photoluminescence spectra showed two separate emission peaks, which corresponded to the energy level transitions from <sup>1</sup>D<sub>2</sub> to <sup>3</sup>H<sub>J</sub> (<i>J</i> = 4 and 5). It is also confirmed that the quenching effect observed between Pr<sup>3+</sup> ions is prominently attributed to quadrupole–quadrupole interactions. The distinct reddish emission for 0.5&#xa0;mol% concentration of KSV:xPr<sup>3+</sup> with colour purity of 99.1% suggests promising potential for applications in optoelectronics and other luminescent materials.</p> Graphical abstract <p></p>

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Synthesis, Rietveld structural analysis and spectral investigations of lamellar type Pr3+modified KSrVO4 nanophosphors for luminescent applications

  • 期刊论文

  • 发表日期：

    2025年3月3日

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  • Neha Lalotra,
  • Margit Fabian,
  • Hirdesh,
  • Kamni Pathania

摘要

The pure KSrVO4[KSV] and Praseodymium doped potassium strontium vanadate [KSV:xPr3+ where x = 0.25–3 mol%] samples were synthesized by combustion synthesis and various analytical techniques were employed to investigate the structural, surface morphology and spectroscopic properties such as X-ray diffraction, photoluminescence spectroscopy, UV–Vis spectroscopy, high-resolution transmission electron microscopy and scanning electron microscopy. Minor phases of potassium metavanadate KVO3 (orthorhombic phase) and strontium vanadateSr3V2O8 (trigonal phase) along with dominant potassium strontium vanadate KSrVO4 (orthorhombic phase) were verified by Rietveld refinement analysis. The particle size of ~ 62.54 nm was determined by high-resolution transmission electron microscopy analysis and scanning electron microscopy confirmed the phosphor's porous nature. The Kubelka–Munk function was used to compute the band gap of the phosphors which is in the range 3.296 to 3.425 eV based on data from diffuse reflectance spectra. When stimulated at 450 nm, photoluminescence spectra showed two separate emission peaks, which corresponded to the energy level transitions from 1D2 to 3HJ (J = 4 and 5). It is also confirmed that the quenching effect observed between Pr3+ ions is prominently attributed to quadrupole–quadrupole interactions. The distinct reddish emission for 0.5 mol% concentration of KSV:xPr3+ with colour purity of 99.1% suggests promising potential for applications in optoelectronics and other luminescent materials.

Graphical abstract