Structural, Optical, and Luminescent Studies of Vanadyl Doped Strontium Tin Phosphate by Solid-state Reaction Method

Document Type : Regular Article

Authors

1 Department of Physics, Acharya Nagarjuna University, Nagarjuna Nagar, Guntur 522510, A.P, India

2 Department of Physics and Electronics, Chaitanya Deemed to University, Hanamkonda 506001, T.S, India

3 Department of Physics, S.V. Arts College, Tirupati 517502, A.P., India

10.22036/pcr.2024.396888.2338

Abstract

VO2+ doped SrSn(PO4)2 nanopowder was prepared by solid state reaction method. The obtained nanopowder was studied using XRD, SEM, HR-TEM, FT-IR, optical absorption, EPR and PL measurements. The X-ray diffraction analysis revealed a monoclinic structure of VO2+ doped SrSn(PO4)2 nanopowder and exhibited an average crystallite size of 26 nm. The size is in the nano scale and W-H plot approach was also in agreement with this value. SEM and HR-TEM images are showing the non-uniform stone-like particle morphology of the prepared sample and confirms information about the average particle size of nanopowder, while EDS analysis confirms elemental composition. The selected area electron diffraction pattern revealed the sample crystalline by means of rings corresponding to XRD planes. Vibration modes related to phosphate functional groups were observed in FT-IR studies. Optical absorption spectrum shows characteristic VO2+ peaks at 520, 668 and 824 nm, and the crystal field and tetragonal parameters were evaluated: Dq = 1497, Ds = -2331 and Dt = 1028 cm-1. From the EPR spectrum, Hamiltonian parameters and hyperfine coupling constant values were calculated. The associated CIE chromaticity coordinates and CCT parameters were computed from the PL spectrum, and they indicate possible applications in LEDs and lighting devices.

Graphical Abstract

Structural, Optical, and Luminescent Studies of Vanadyl Doped Strontium Tin Phosphate by Solid-state Reaction Method

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Physical Chemistry Research
Volume 12, Issue 3 - Serial Number 43
September 2024
Pages 771-781

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History

  • Receive Date: 12 May 2023
  • Revise Date: 09 December 2023
  • Accept Date: 28 January 2024

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