Investigation of Structural and Photoluminescence Properties of Neodymium-Doped Vanadium Pentoxide Thin Films Synthesized via Sol-Gel Route

Document Type : Original Article

Authors

1 Physics department, Faculty of Science, Al Azhar University, Cairo, Egypt.

2 Physics department, Faculty of Science, Al Azhar University, Cairo, Egypt

Abstract

In this study, various compositions of NdxV2O5.nH2O with "x" ranging from 0 to 0.6 mol% were prepared. These nanocrystalline layers were synthesized via the sol-gel route. We investigated the intercalation effect of Nd+3 ions on the microstructure, vibrational, and optical behavior of V2O5.nH2O thin films using high-resolution X-ray diffraction (XRD), Fourier-transform infrared (FTIR) spectroscopy, Raman spectroscopy, and photoluminescence (PL) spectroscopy. XRD analysis revealed an orthorhombic structure with a preferred (001) orientation. Increasing neodymium content resulted in a decrease in crystallite size from 8.06 nm to 4.21 nm, with a corresponding increase in interlayer spacing from 1.09 nm to 1.32 nm, indicating successful intercalation of Nd+3 ions. FTIR spectroscopy verified the incorporation of Nd+3 ions by detecting shifts in the V=O stretching mode and the appearance of new peaks. Raman spectra analysis illustrated significant variations in the vibrational modes, including peak shifts, intensity variations, and the appearance of new peaks, specifically at higher Nd concentrations. Room temperature PL spectra analysis displayed three main emission peaks around 338 nm, 532 nm, and 720 nm, ascribed to defect states and band edge transitions in V2O5.nH2O.

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International Journal of Theoretical and Applied Research
Volume 4, Issue 1
June 2025
Pages 577-585

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