{
  "abstract": "Quasi-2D Ruddlesden-Popper halide perovskites are promising materials for light-emitting applications. They comprise corner-sharing metal-halide octahedra separated by bulky, insulating organic spacers and exhibit tunable bandgaps by varying the number of octahedral layers, n . Isolating a single n -phase within a film remains challenging, with spin-coated films generally containing a broad distribution of n phases. Their emission is dominated by the largest n -number present due to energy funneling towards narrow bandgap phases. Here, we electrospin phenylethylammonium (PEA + )/methylammonium (MA + ) lead bromide quasi-2D perovskites into 140 - 400 nm nanofibers to restrict molecular diffusion. We observe progressive redshifts in absorption and photoluminescence from blue (410 nm) to cyan (470 nm) to green (530 nm) with decreasing PEA + :MA + molar ratio. In contrast, spin-coated films with the same PEA + :MA + ratios exhibit green emission (524 - 532 nm) across all MA + containing compositions. Transient absorption spectroscopy reveals energy transfer within 80 ps from low n phases to MAPbBr 3 domains in spin-coated films, which are absent in electrospun fibers. Electrospun fibers are also highly emissive compared to spin-coated films, with average photoluminescence quantum yields up to 77±1%. These results suggest that electrospinning limits organic cation diffusion to selectively stabilize intermediate n phases, providing a scalable route to achieve tunable solid-state emission.",
  "abstract_shown": true,
  "affiliations": [
    "Chemistry, New York University, 100 Washington Square East, New York, NY, United States, 10003-6688",
    "Laboratory for Energy Materials, École Polytechnique Fédérale de Lausanne, Sion 1951, Switzerland",
    "Chemical and Biomolecular Engineering",
    "New York University",
    "Chemical Engineering and Materials Science",
    "Stevens Institute of Technology"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 11,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Arnold Wijoyo",
      "orcid": "0009-0006-6589-2195"
    },
    {
      "affs": [
        1
      ],
      "name": "Huygen J. Jöbsis",
      "orcid": "0000-0002-7417-1246"
    },
    {
      "affs": [
        1
      ],
      "name": "Hongki Kim",
      "orcid": "0009-0000-8662-8592"
    },
    {
      "affs": [
        2,
        3
      ],
      "name": "Pulkita Jain",
      "orcid": "0009-0005-1996-0700"
    },
    {
      "affs": [
        0
      ],
      "name": "Emory Gaddis",
      "orcid": "0009-0008-8387-6695"
    },
    {
      "affs": [
        0
      ],
      "name": "Jiahui Althena Zhu",
      "orcid": "0009-0007-0715-6912"
    },
    {
      "affs": [
        0
      ],
      "name": "Mia Klopfenstein",
      "orcid": "0000-0002-9608-7862"
    },
    {
      "affs": [
        4,
        5
      ],
      "name": "Tsengming Chou"
    },
    {
      "affs": [
        2,
        3
      ],
      "name": "Eray S. Aydil",
      "orcid": "0000-0002-8377-9480"
    },
    {
      "affs": [
        1
      ],
      "name": "Sascha Feldmann",
      "orcid": "0000-0002-6583-5354"
    },
    {
      "affs": [
        0
      ],
      "name": "Stephanie S. Lee",
      "orcid": "0000-0003-0964-6353"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/1qssaq4rwtees.bib",
  "cited_by": 0,
  "doi": "10.26434/chemrxiv.15010839/v1",
  "fulltext_url": null,
  "id": "1qssaq4rwtees",
  "issns": [],
  "landing_url": "https://chemrxiv.org/doi/full/10.26434/chemrxiv.15010839/v1",
  "language": null,
  "licence": "CC-BY",
  "licence_label": "CC BY",
  "licence_source": "journal",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "2208|Perovskite Materials and Applications"
    ]
  ],
  "openalex": "W7223188278",
  "pdf_url": "https://chemrxiv.org/doi/pdf/10.26434/chemrxiv.15010839/v1",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-22",
  "publisher": "American Chemical Society (ACS)",
  "ris": "https://research.draconitic.com/paper/1qssaq4rwtees.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:24Z",
      "native_id": "10.26434/chemrxiv.15010839",
      "source": "chemrxiv",
      "url": "https://chemrxiv.org/doi/full/10.26434/chemrxiv.15010839/v1"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "source:chemrxiv",
      "subfield": "general"
    }
  ],
  "title": "Tunable Emission from Quasi-2D Perovskites via Electrospinning",
  "title_text": "Tunable Emission from Quasi-2D Perovskites via Electrospinning",
  "type": "preprint",
  "updated_at": "2026-10-30T12:17:24Z",
  "url": "https://research.draconitic.com/paper/1qssaq4rwtees",
  "venue": "ChemRxiv",
  "versions": []
}