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Photoluminescence features of trivalent holmium doped Ca2La8(SiO4)6O2 phosphors

  • Vijay Singh EMAIL logo , Amol Nande and S. J. Dhoble
Published/Copyright: August 31, 2023
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 114 Issue 12

Abstract

This study examines the optical properties of Ca2La8−x(SiO4)6O2:xHo3+ phosphors derived using the sol–gel method. X-ray diffraction data and Rietveld analysis confirmed that the phosphors formed in hexagonal phase with an average estimated crystalline size of 27 nm. The prominent excitation peak observed at wavelength 463 nm corresponding to excitation energy 2.68 eV was due to the 5I8 → 5G6 + 5F1 transition. The photoluminescence emission spectra revealed that the synthesized phosphors emitted in the green color region with the 5S2 + 5F4 → 5I8 transition, releasing 2.27 eV energy. The emission and excitation analyses revealed the presence of concentration quenching as the Ho3+ concentration exceeded 0.03 mol in the Ca2La8−x(SiO4)6O2:xHo3+ series. Further, photometry analysis demonstrated a color purity exceeding 94 %, which supports the candidacy of these phosphors for solid-state lighting applications.

Keywords: Ca2La8(SiO4)6O2; Ho3+ ions; Photoluminescence; Sol–gel
Corresponding author: Vijay Singh, Department of Chemical Engineering, Konkuk University, Seoul 05029, Republic of Korea, E-mail:

  1. Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.

  2. Research funding: This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. 2021R1A2C1092509). This paper was supported by the KU Research Professor Program of Konkuk University.

  3. Conflict of interest statement: The authors declare no conflicts of interest regarding this article.

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Received: 2022-07-11
Accepted: 2022-09-28
Published Online: 2023-08-31
Published in Print: 2023-12-27

© 2023 Walter de Gruyter GmbH, Berlin/Boston

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https://doi.org/10.1515/ijmr-2022-0314
Keywords for this article
Ca2La8(SiO4)6O2; Ho3+ ions; Photoluminescence; Sol–gel

Articles in the same Issue

  1. Frontmatter
  2. Original Papers
  3. Nanocrystalline PbS thin film produced by alkaline chemical bath deposition: effect of inhibitor levels and temperature on the physicochemical properties
  4. Effect of laser power on microstructure and tribological behavior of laser clad NiCr coating
  5. Mechanical characterization and evaluation of pitting corrosion resistance of a superferritic stainless steel model alloy 25Cr–6Mo–5Ni
  6. Factors dictating the extent of low elongation in high sulfur-containing bainitic steels
  7. Effect of process parameters on mechanical properties and wettability of polylactic acid by fused filament fabrication process
  8. Critical systematic investigation of the Cd–Ce system: phase stability and Gibbs energies of formation and equilibria via thermodynamic description
  9. Experimental study of the phase relations of the Fe–Pt–Ho ternary system at 500 °C
  10. Ultraviolet-B radiation from Gd (III) doped hardystonite
  11. Photoluminescence features of trivalent holmium doped Ca2La8(SiO4)6O2 phosphors
  12. Thermal stability of Al3BC3 powders under a nitrogen atmosphere
  13. News
  14. DGM – Deutsche Gesellschaft für Materialkunde
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