{
  "abstract": "Medium-entropy aluminate perovskites of nominal composition (La1/3Gd1/3Y1/3)1−xMxAlO3−δ:0.1%Mn4+ (x = 0, 0.05, 0.1; M = Ca, Sr), were prepared by sol-gel and solid-state routes to examine the effects of synthesis, annealing temperature and A-site substitution on their luminescence. In the case of alkaline-earth-free (La1/3Gd1/3Y1/3)AlO3 system, single-phase materials are formed after heat treatment of sol-gel derived products at the temperature of 1000–1100 °C. Calcium-substituted samples prepared via the sol-gel method are single-phase over a wide annealing temperature range of 1000–1500 °C, whereas strontium-containing samples contain a minor amount of the secondary-phase RESrAl3O7. Solid-state products are multiphase materials, containing perovskite and garnet phase, with extra RECaAl3O7 phase in Ca-substituted samples. The unchanged emission position and spectral profile indicate that Mn4+ ions occupy the same octahedral coordination environment of the perovskite structure in all samples. Moreover, no additional spectral features associated with a garnet phase were detected. However, phase composition, microstructure, and defect chemistry affected PL intensity and trapping. For sol-gel samples, PL was strongest at 1450 °C, whereas TSL was strongest at 1100 °C. Ca2+ and Sr2+ substitution reduced both signals and modified the glow-band shape, with Ca causing the larger decrease, consistent with dopant partitioning and charge compensation. Broad TSL may reflect distributed trap environments from mixed La/Gd/Y occupation. Solid-state samples showed stronger PL, higher TSL, and measurable UV-excited afterglow.",
  "abstract_shown": true,
  "affiliations": [
    "Institute of Physics, Polish Academy of Sciences, Aleja Lotników 32/46, 02-668 Warsaw, Poland",
    "Lviv Polytechnic National University, S. Bandera Street 12, 79013 Lviv, Ukraine"
  ],
  "article_type": "research article",
  "arxiv": null,
  "author_total": 7,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Akash S. Padole"
    },
    {
      "affs": [
        1
      ],
      "name": "Vasyl Hreb",
      "orcid": "0000-0001-7086-5446"
    },
    {
      "affs": [
        1
      ],
      "name": "Vitalii Stadnik",
      "orcid": "0000-0003-0235-5641"
    },
    {
      "affs": [
        1
      ],
      "name": "Yurii Hirskyi",
      "orcid": "0009-0008-9566-9124"
    },
    {
      "affs": [
        0
      ],
      "name": "Halyna Zhydachevska"
    },
    {
      "affs": [
        1
      ],
      "name": "Leonid Vasylechko",
      "orcid": "0000-0003-4231-9186"
    },
    {
      "affs": [
        0
      ],
      "name": "Yaroslav Zhydachevskyy",
      "orcid": "0000-0003-4774-5977"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/d7xaqrx3bda5n.bib",
  "cited_by": 0,
  "doi": "10.3390/molecules31203744",
  "fulltext_url": "https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13707606/?tool=EBI",
  "id": "d7xaqrx3bda5n",
  "issns": [
    "1420-3049"
  ],
  "landing_url": "https://www.mdpi.com/1420-3049/31/20/3744",
  "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": [
    [
      "openalex",
      "2505|Luminescence Properties of Advanced Materials"
    ]
  ],
  "openalex": "W7222986729",
  "pdf_url": "https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13707606/pdf/?tool=EBI",
  "pmcid": "PMC13707606",
  "pmid": null,
  "published": "2026-10-01",
  "publisher": "MDPI AG",
  "ris": "https://research.draconitic.com/paper/d7xaqrx3bda5n.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:18:42Z",
      "native_id": "10.3390/molecules31203744",
      "source": "crossref",
      "url": "https://www.mdpi.com/1420-3049/31/20/3744"
    },
    {
      "first_seen": "2026-10-30T12:21:44Z",
      "native_id": "PMC:PMC13707606",
      "source": "europepmc",
      "url": "https://europepmc.org/article/PMC/PMC13707606"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "openalex:2505|Luminescence Properties of Advanced Materials",
      "subfield": "materials-polymers"
    }
  ],
  "title": "Synthesis, Structural and Luminescence Properties of Mn4+-Activated Medium-Entropy Perovskites (La1/3Gd1/3Y1/3)1−xMxAlO3−δ (M = Ca, Sr)",
  "title_text": "Synthesis, Structural and Luminescence Properties of Mn4+-Activated Medium-Entropy Perovskites (La1/3Gd1/3Y1/3)1−xMxAlO3−δ (M = Ca, Sr)",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:21:44Z",
  "url": "https://research.draconitic.com/paper/d7xaqrx3bda5n",
  "venue": "Molecules",
  "versions": []
}