Dual-luminescent Sc2(MoO4)3:Dy3+/Eu3+ phosphor system: energy transfer dynamics and high-sensitivity temperature sensing

W4413970640 · 수집 2026-10-04 18:16:39

T11878 Solid-state spectroscopy and crystallography

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A series of Dy3+/Eu3+ co-doped Sc2(MoO4)3 (SMO) phosphors were synthesized via a conventional solid-state reaction. Phase purity and morphology were characterized by X-ray diffraction with Rietveld refinement and scanning electron microscopy, confirming the formation of phase-pure orthorhombic crystals. The electronic structure was investigated through density functional theory calculations combined with diffuse reflectance spectroscopy. Under 266 and 352 nm excitation, the Dy3+ doped SMO phosphors exhibited characteristic emission peaks at 488 nm (4F9/2 → 6H15/2), 578 nm (4F9/2 → 6H13/2), 667 nm (4F9/2 → 6H11/2), and 761 nm (4F9/2 → 6H9/2). In the Dy3+/Eu3+ co-doped systems, detailed analysis of spectra and luminescence decay kinetics quantitatively confirmed efficient energy transfer from Dy3+ to Eu3+. Finally, the optimized SMO:Dy3+, Eu3+ phosphors achieved maximum relative (S r) and absolute (S a) sensitivities of 3.817% K-1 and 0.018 K-1, respectively, demonstrating potential for ratiometric optical thermometry applications.

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Dual-luminescent Sc<sub>2</sub>(MoO<sub>4</sub>)<sub>3</sub>:Dy<sup>3+</sup>/Eu<sup>3+</sup> phosphor system: energy transfer dynamics and high-sensitivity temperature sensing

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