Optical analysis of RE³⁺ (re = Sm, Dy): MgLa₂V2O9 phosphors

Abstract

In this work, we have prepared the RE³⁺(Sm, Dy): MgLa₂V₂O₉ phosphors of different mol% by solid-state reaction approach. The obtained powder phosphors of RE³⁺(Sm, Dy): MgLa₂V₂O₉ were analyzed by SEM, XRD, FTIR, EDAX, PL spectroscopy, and CIE chromaticity diagram of the color of different mol%. The XRD pattern of the powder phosphors exhibits the phosphor’s crystalline nature. The obtained size of prepared phosphors is around the size of 500 nm was observed by analysis of SEM. The element’s existence in the phosphors was obtained by analysis of EDAX. Functional groups were identified by FTIR analysis. From the PL analysis Sm³⁺: MgLa₂V₂O₉ phosphors show intense orange-red emission at 599 nm, that is attributed to the ⁴G_5/2→⁶H_7/2 transition having an excitation λ_exci=404nm (⁶H_5/2→⁴F_7/2). It exhibits yellow emission for Dy³⁺: MgLa₂V₂O₉at 574 nm having a transition of ⁴F_9/2→⁶H_13/2having an excitation wavelength λ_exci.= (⁶H_15/2→⁴I_15/2). The CIE diagram shows the orange and yellow emission for Sm³⁺: MgLa₂V₂O₉ and Dy³⁺:MgLa₂V₂O₉correspondingly. The CIE coordinates shows that the great purity of color of the phosphors powder.

Keywords:

• Vanadate phosphors
• emission
• excitation
• photoluminescence and FT-IR analysis

Acknowledgments

The authors acknowledge Prof. S. J. Dhoble, Department of Physics, RTM Nagpur University, Nagpur who is providing the PL measurements, Prof. Y. P. Venkata Subbaiah, Department of Physics, Yogivemana University, Kadapa for providing the XRD, EDAX facility and Dr. U. Rambau, C-MET, Hyderabad is providing the FT-IR spectral measurements, and also Prof. B. Deva Prasad Raju, Department of Physics. S.V. University, Tirupati is providing FTIR and Absorption spectral measurements.

Disclosure statement

No potential conflict of interest was reported by the author(s).