{
  "abstract": "This work reports, for the first time, the synthesis of single-phase trivalent samarium-doped yttrium pyrogermanate (Y2Ge2O7:xSm3+) phosphors via the sol–gel method. The crystalline structure, photoluminescence mechanisms, energy transfer dynamics, and optical thermometry properties were systematically investigated. The experimental optical bandgap (∼5.99–6.10 eV) shows good agreement with those obtained from the density functional theory (DFT) calculations. Upon Sm3+ incorporation, a concentration quenching effect reduces the quantum yield from 8.1% to 0.3%, correlated with a reduction in the average lifetime from 2.08 to 0.61 ms. Analysis of the decay kinetics via the Van Uitert model indicates a dipole–dipole interaction governing the energy transfer, achieving a cross-relaxation efficiency of ∼73% at 4.0 mol %. Remarkably, the CIE coordinates, correlated color temperature (CCT), and color purity (CP) remain independent of the dopant content, exhibiting an exceptional red color purity above 95% for all samples. These results demonstrate that Y2Ge2O7xSm3+ phosphors are promising candidates for solid-state lighting and multifunctional optical applications. Additionally, the ratio between emission sub-bands from 4G5/2 → 6H9/2 to 4G5/2 → 6H5/2 provides a relative sensitivity value (SR) for the sample with 4.0 mol % up to 0.23%/K, indicating a potential use as an optical sensing thermometer.",
  "abstract_shown": true,
  "affiliations": [
    "Universidade Federal de Goiás , , , ,",
    "Instituto Tecnológico de Aeronáutica , , ,"
  ],
  "article_type": "research article",
  "arxiv": null,
  "author_total": 8,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Amanda Alencar Arrais de Garcia",
      "orcid": "0009-0007-6236-5944"
    },
    {
      "affs": [
        0
      ],
      "name": "Isabella Lima Caetano"
    },
    {
      "affs": [
        0
      ],
      "name": "Francisco Alisson da Silva Torquato",
      "orcid": "0000-0002-1976-9210"
    },
    {
      "affs": [
        1
      ],
      "name": "Marcelo Marques",
      "orcid": "0000-0002-9241-5048"
    },
    {
      "affs": [
        1
      ],
      "name": "Lara K. Teles",
      "orcid": "0000-0002-8713-2094"
    },
    {
      "affs": [
        0
      ],
      "name": "Renato Borges Pontes",
      "orcid": "0000-0002-3336-3882"
    },
    {
      "affs": [
        0
      ],
      "name": "Lauro June Queiroz Maia"
    },
    {
      "affs": [
        0
      ],
      "name": "Ricardo Costa de Santana",
      "orcid": "0000-0002-6484-7484"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/4mgv50bkshrb8.bib",
  "cited_by": 0,
  "doi": "10.1021/acsomega.6c05178",
  "fulltext_url": "https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13717785/?tool=EBI",
  "id": "4mgv50bkshrb8",
  "issns": [
    "2470-1343"
  ],
  "landing_url": "https://pubs.acs.org/acsodf/article/11/42/64870/5450089/Sm3-Doped-Y2Ge2O7-Orange-Red-Phosphor-Prepared-via",
  "language": "eng",
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "heading",
      "Article"
    ],
    [
      "openalex",
      "2505|Luminescence Properties of Advanced Materials"
    ]
  ],
  "openalex": "W7221644440",
  "pdf_url": "https://pubs.acs.org/doi/pdf/10.1021/acsomega.6c05178",
  "pmcid": "PMC13717785",
  "pmid": "42959997",
  "published": "2026-10-13",
  "publisher": "American Chemical Society (ACS)",
  "ris": "https://research.draconitic.com/paper/4mgv50bkshrb8.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:18:39Z",
      "native_id": "10.1021/acsomega.6c05178",
      "source": "crossref",
      "url": "https://pubs.acs.org/acsodf/article/11/42/64870/5450089/Sm3-Doped-Y2Ge2O7-Orange-Red-Phosphor-Prepared-via"
    },
    {
      "first_seen": "2026-10-31T00:20:37Z",
      "native_id": "PMC:PMC13717785",
      "source": "europepmc",
      "url": "https://europepmc.org/article/PMC/PMC13717785"
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    {
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      "native_id": "PMC13717785",
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      "url": "https://doi.org/10.1021/acsomega.6c05178"
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  "subjects": [
    {
      "field": "chemistry",
      "origin": "openalex:2505|Luminescence Properties of Advanced Materials",
      "subfield": "materials-polymers"
    }
  ],
  "title": "Sm3+-Doped Y2Ge2O7 Orange-Red Phosphor Prepared via the Sol–Gel Method for Multimodal Applications: A Study of of the Effect of Dopant Concentration on Structural and Optical Properties",
  "title_text": "Sm3+-Doped Y2Ge2O7 Orange-Red Phosphor Prepared via the Sol–Gel Method for Multimodal Applications: A Study of of the Effect of Dopant Concentration on Structural and Optical Properties",
  "type": "peer-reviewed",
  "updated_at": "2026-11-02T12:22:02Z",
  "url": "https://research.draconitic.com/paper/4mgv50bkshrb8",
  "venue": "ACS Omega",
  "versions": []
}