{
  "abstract": "Recently, chalcogenide perovskites that are fully inorganic and composed of earth-abundant elements are emerging as non-toxic alternatives to established lead-halide perovskite materials. However, chalcogenide perovskite compositions relevant for optoelectronic applications such as solar cells remain largely unexplored due to the complex, high-temperature synthesis routes involved and difficulties in obtaining high purities. Here, we present a new solid-state synthesis route for facile fabrication of mixed-chalcogenide perovskite powders BaZr(S 1−x Se x ) 3 , where 0 ≤ x ≤ 0.3. We obtain high-purity chalcogenide perovskite powders at moderate temperatures (600 ◦ C) and short reaction times (24 hours). We demonstrate that precursor selection and chalcogen stoichiometry can effectively be used to control the perovskite composition. By increasing Se content (x), the band gaps of the mixed-chalcogenide perovskites can be controllably tuned from 1.83 to 1.58 eV, spanning the desired range for single-and multi-junction solar cells. Broadly, our findings establish a generalisable synthesis method for preparing several mixed-chalcogenide perovskite compositions, including BaZr(S 1−x Se x ) 3 and BaHf(S 1−x Se x ) 3 .",
  "abstract_shown": true,
  "affiliations": [
    "Department of Chemical Engineering",
    "University College London",
    "Manufacturing Futures Lab, University College London, 7 Sidings Street, London, United Kingdom, E20 2AE",
    "School of Chemistry",
    "University of Birmingham",
    "Department of Solution-Processing of Hybrid Materials and Devices",
    "Helmholtz-Zentrum Berlin für Materialien und Energie GmbH"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 8,
  "authors": [
    {
      "affs": [
        0,
        1,
        2
      ],
      "name": "Mo El Maoued",
      "orcid": "0009-0006-7204-2607"
    },
    {
      "affs": [
        3,
        4,
        5,
        6
      ],
      "name": "Benjamin M. Gallant"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Matteo Paloni"
    },
    {
      "affs": [
        3,
        4
      ],
      "name": "Luis Simbari"
    },
    {
      "affs": [
        0,
        1,
        2
      ],
      "name": "Shams Elnawawi"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Matteo Salvalaglio"
    },
    {
      "affs": [
        3,
        4
      ],
      "name": "Dominik J. Kubicki"
    },
    {
      "affs": [
        0,
        1,
        2
      ],
      "name": "Amita Ummadisingu"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/0773jnkaq3f0c.bib",
  "cited_by": 0,
  "doi": "10.26434/chemrxiv.15009318/v1",
  "fulltext_url": null,
  "id": "0773jnkaq3f0c",
  "issns": [],
  "landing_url": "https://chemrxiv.org/doi/full/10.26434/chemrxiv.15009318/v1",
  "language": null,
  "licence": "CC-BY-NC-ND",
  "licence_label": "CC BY-NC-ND",
  "licence_source": "journal",
  "licence_url": "https://creativecommons.org/licenses/by-nc-nd/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "2208|Perovskite Materials and Applications"
    ]
  ],
  "openalex": "W7214102071",
  "pdf_url": null,
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-22",
  "publisher": "American Chemical Society (ACS)",
  "ris": "https://research.draconitic.com/paper/0773jnkaq3f0c.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:21Z",
      "native_id": "10.26434/chemrxiv.15009318",
      "source": "chemrxiv",
      "url": "https://chemrxiv.org/doi/full/10.26434/chemrxiv.15009318/v1"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "source:chemrxiv",
      "subfield": "general"
    }
  ],
  "title": "Solid-state synthesis of high-purity mixed-chalcogenide perovskites",
  "title_text": "Solid-state synthesis of high-purity mixed-chalcogenide perovskites",
  "type": "preprint",
  "updated_at": "2026-10-30T12:17:21Z",
  "url": "https://research.draconitic.com/paper/0773jnkaq3f0c",
  "venue": "ChemRxiv",
  "versions": []
}