Synthesis, Photoluminescence and Thermoluminescence Properties of Sm³⁺ and Dy³⁺ Ions Doped Barium Gadolinium Titanate Ceramics

Abstract

This article reports on the synthesis, photoluminescence and thermoluminescence properties of samarium and dysprosium ions doped barium gadolinium titanate powder ceramics. The prepared samples were characterized by X- ray diffraction spectrum and it is observed that Sm³⁺ and Dy³⁺ ions doped barium gadolinium titanate powder ceramics are orthorhombic structure. From the SEM images of Sm³⁺ and Dy³⁺: BaGd₂Ti₄O₁₂ ceramics, it is observed that the average grain size in the range ∼200-300 nm. The elements present in the composition are confirmed by the EDAX profiles and functional groups have been identified by using Fourier Transform Infrared spectroscopy. Photoluminescence spectra of Sm³⁺: BaGd₂Ti₄O₁₂ ceramics have shown strong reddish- orange emission at 598 nm (⁴G_5/2→⁶H_7/2) with an excitation wavelength λ_exci = 408 nm (⁶H_5/2→⁴F_7/2) and Dy³⁺: BaGd₂Ti₄O₁₂ ceramics have shown yellow emission at 587 nm (⁴F_9/2→ ⁶H_13/2) with an excitation wavelength λ_exci = 427 nm (⁶H_15/2 → ⁴G_11/2). Thermoluminescence (TL) nature of Sm³⁺ and Dy³⁺ ions doped BaGd₂Ti₄O₁₂ ceramics has been observed with gamma ray irradiation.

Keywords:

• Photoluminescence (PL)
• thermoluminescence (TL)
• SEM
• EDAX

Funding

This work was supported by the UGC, New Delhi in the form of Major Research Project F.No.41-919/2012 (SR) sanctioned to the author (CNR) and also provided the financial assistance to one of the authors (BMS) in the form of Project Fellow, who would like to thank the Secretary, UGC, New Delhi, India.