{"database":"biostudies-literature","file_versions":[],"scores":null,"additional":{"omics_type":["Unknown"],"volume":["12(45)"],"submitter":["Chen J"],"pubmed_abstract":["Concentration quenching, which generally originates from serious energy migrations among the uniformly distributed luminescent centers in the host matrix, is a key factor to influence the luminescence properties of materials. Different from previous reports, we demonstrate a novel fluorescence-quenching mechanism attributable to the second-phase Eu<sub>2</sub>W<sub>2</sub>O<sub>9</sub> in non-equivalent substituted SrWO<sub>4</sub>:<i>x</i>Eu<sup>3+</sup> phosphors. The crystal structure, elemental distribution, and luminescence properties of the as-prepared SrWO<sub>4</sub>:<i>x</i>Eu<sup>3+</sup> phosphors are systematically investigated. A second-phase Eu<sub>2</sub>W<sub>2</sub>O<sub>9</sub> is confirmed when the Eu<sup>3+</sup>-doping concentration exceeds 20%, which produces the new structure defects and energy-transfer paths, resulting in fluorescence quenching in this material. This finding gives a new perspective to analyze the concentration-quenching mechanism of the non-equivalent substituted phosphors and can help in the design of new, efficient luminescence materials. In addition, the as-prepared SrWO<sub>4</sub>:<i>x</i>Eu<sup>3+</sup> phosphors exhibit a strong intrinsic excitation in the range of 355-425 nm, which is accompanied by the Commission Internationale de I'Eclairage (CIE) coordinates at (0.653, 0.347) and stable color purity of up to 94.52%. A packaged white light-emitting diode with CIE chromaticity coordinates of (0.398, 0.335), correlated color temperature of 3132 K, and color rendering index of 84.3 is fabricated by SrWO<sub>4</sub>:20%Eu<sup>3+</sup> phosphors with blue BAM:Eu<sup>2+</sup> and green YAGB:Tb<sup>3+</sup> phosphors in a near-ultraviolet chip."],"journal":["RSC advances"],"pagination":["29338-29345"],"full_dataset_link":["https://www.ebi.ac.uk/biostudies/studies/S-EPMC9585437"],"repository":["biostudies-literature"],"pubmed_title":["Second-phase-induced fluorescence quenching in non-equivalent substituted red phosphors."],"pmcid":["PMC9585437"],"pubmed_authors":["Yang X","Zhou L","Wu M","Chen J","Jiang C","Wang Y"],"additional_accession":[]},"is_claimable":false,"name":"Second-phase-induced fluorescence quenching in non-equivalent substituted red phosphors.","description":"Concentration quenching, which generally originates from serious energy migrations among the uniformly distributed luminescent centers in the host matrix, is a key factor to influence the luminescence properties of materials. Different from previous reports, we demonstrate a novel fluorescence-quenching mechanism attributable to the second-phase Eu<sub>2</sub>W<sub>2</sub>O<sub>9</sub> in non-equivalent substituted SrWO<sub>4</sub>:<i>x</i>Eu<sup>3+</sup> phosphors. The crystal structure, elemental distribution, and luminescence properties of the as-prepared SrWO<sub>4</sub>:<i>x</i>Eu<sup>3+</sup> phosphors are systematically investigated. A second-phase Eu<sub>2</sub>W<sub>2</sub>O<sub>9</sub> is confirmed when the Eu<sup>3+</sup>-doping concentration exceeds 20%, which produces the new structure defects and energy-transfer paths, resulting in fluorescence quenching in this material. This finding gives a new perspective to analyze the concentration-quenching mechanism of the non-equivalent substituted phosphors and can help in the design of new, efficient luminescence materials. In addition, the as-prepared SrWO<sub>4</sub>:<i>x</i>Eu<sup>3+</sup> phosphors exhibit a strong intrinsic excitation in the range of 355-425 nm, which is accompanied by the Commission Internationale de I'Eclairage (CIE) coordinates at (0.653, 0.347) and stable color purity of up to 94.52%. A packaged white light-emitting diode with CIE chromaticity coordinates of (0.398, 0.335), correlated color temperature of 3132 K, and color rendering index of 84.3 is fabricated by SrWO<sub>4</sub>:20%Eu<sup>3+</sup> phosphors with blue BAM:Eu<sup>2+</sup> and green YAGB:Tb<sup>3+</sup> phosphors in a near-ultraviolet chip.","dates":{"release":"2022-01-01T00:00:00Z","publication":"2022 Oct","modification":"2025-04-05T11:57:11.881Z","creation":"2025-04-05T11:57:11.881Z"},"accession":"S-EPMC9585437","cross_references":{"pubmed":["36329764"],"doi":["10.1039/d2ra05647j"]}}