Repositori institucional URV
| URV's Author/s: | Mateos Ferré, Xavier / Serres Serres, Josep Maria / Solé Cartañà, Rosa Maria |
| Author, as appears in the article.: | Douzi, Abir; Slimi, Sami; Madirov, Eduard; Serres, Josep Maria; Sole, Rosa Maria; Ben Salem, Ezzedine; Turshatov, Andrey; Richards, Bryce S; Mateos, Xavier |
| Author's mail: | xavier.mateos@urv.cat rosam.sole@urv.cat josepmaria.serres@urv.cat |
| Author identifier: | 0000-0003-1940-1990 0000-0002-5769-4141 0000-0002-4299-538X |
| Journal publication year: | 2025 |
| Publication Type: | Journal Publications |
| APA: | Douzi, Abir; Slimi, Sami; Madirov, Eduard; Serres, Josep Maria; Sole, Rosa Maria; Ben Salem, Ezzedine; Turshatov, Andrey; Richards, Bryce S; Mateos, X (2025). Investigation of luminescence properties and ratiometric thermometry through yellow-to-blue Dy3+ emission in Ca3La7(SiO4)5(PO4)O2 apatite. Rsc Advances, 15(25), 19623-19639. DOI: 10.1039/d5ra01912e |
| Paper original source: | Rsc Advances. 15 (25): 19623-19639 |
| Abstract: | Dy3+-doped Ca3La7(SiO4)5(PO4)O2 (CLSPO) phosphors were synthesized via a solid-state reaction method and characterized for their structural, optical, and thermometric properties. X-ray diffraction (XRD) and Rietveld refinement confirmed a hexagonal apatite-type structure (P63/m) with refined lattice parameters of a = b = 9.604(3) & Aring;, c = 7.103(1) & Aring;. First-principles calculations for the undoped crystal revealed a direct bandgap of 4.08 eV, confirming CLSPO as a suitable host material for luminescent applications. Photoluminescence spectra exhibited characteristic Dy3+ emissions, with two blue bands (B1: 468 nm, B2: 479 nm) and two yellow bands (Y1: 543 nm, Y2: 575 nm). The yellow-to-blue (Y/B) intensity ratio displayed a strong temperature dependence, establishing CLSPO:Dy3+ as a promising candidate for luminescence-based thermometry. The optimal Dy3+ doping concentration was determined to be 3 at%, beyond which concentration quenching effects were observed. Photoluminescence studies further demonstrated that electric dipole-dipole interactions govern the dominant energy transfer mechanism, as evidenced by concentration-dependent quenching behavior. The absolute photoluminescence quantum yield (PLQY) was 5.7%, and Arrhenius analysis determined an activation energy of 0.11 eV. The decay time decreases with increasing Dy3+ concentration (from 658 mu s at 0.5 at% Dy3+ to 252 mu s at 10 at%). The fluorescence intensity ratio (FIR) method for optical thermometry revealed an absolute sensitivity (Sa) of 3.27 10-4 K-1 at 298 K, while the repeatability (R) of the Y/B ratio exhibited a reproducibility of 95.88% at 298 K, ensuring consistent and reliable temperature sensing performance. Furthermore, the luminescence remained stable over three hours of multiple heating-cooling cycles (298-523 K), confirming excellent photostability and reversibility. These results establish CLSPO:Dy3+ phosphors as highly efficient, thermally stable, and optically robust materials for next-generation temperature sensors, solid-state lighting, and advanced photonic applications. |
| Article's DOI: | 10.1039/d5ra01912e |
| Link to the original source: | https://pubs.rsc.org/en/content/articlelanding/2025/ra/d5ra01912e |
| Paper version: | info:eu-repo/semantics/publishedVersion |
| licence for use: | https://creativecommons.org/licenses/by/3.0/es/ |
| Department: | Química Física i Inorgànica |
| Licence document URL: | https://repositori.urv.cat/ca/proteccio-de-dades/ |
| Thematic Areas: | Astronomia / física Biodiversidade Biotecnología Chemical engineering (all) Chemical engineering (miscellaneous) Chemistry (all) Chemistry (miscellaneous) Chemistry, multidisciplinary Ciência da computação Ciência de alimentos Ciências agrárias i Ciências ambientais Ciências biológicas i Ciências biológicas ii Ciências biológicas iii Economia Engenharias i Engenharias ii Engenharias iii Engenharias iv Ensino Farmacia General chemical engineering General chemistry Geociências Interdisciplinar Materiais Medicina i Medicina ii Medicina iii Medicina veterinaria Odontología Química Saúde coletiva Zootecnia / recursos pesqueiros |
| Keywords: | Borate glasses Eu3+ Lase Phosphor |
| Entity: | Universitat Rovira i Virgili |
| Record's date: | 2025-08-02 |
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