{
  "abstract": "Efficient exciton transport is central to the development of low-dimensional semiconductors for optoelectronic applications. Layered metal halide perovskites provide a versatile platform for regulating excitonic interactions through spacer-layer engineering. Here, we demonstrate that alternating-cation-in-the-interlayer space (ACI) perovskites exhibit markedly rapid interphase exciton funneling compared with conventional Ruddlesden-Popper (RP) and Dion-Jacobson (DJ) architectures. Using femtosecond transient absorption and time-resolved photoluminescence spectroscopy, complemented by full-spectrum global analysis, we reveal rapid exciton transfer from lower-n toward higher-n quantum wells. The concomitant decay of lower-n excitonic signals and growth of higher-n features, together with the species-associated spectral evolution, are consistent with a predominantly Förster-type interphase energy-transfer mechanism. The characteristic early-time dynamics correlate with shorter interlayer spacing along the stacking direction, suggesting that spacer-layer architecture contributes to modulation of interphase excitonic coupling. While differences in phase distribution, spectral overlap, and domain morphology may additionally influence the measured dynamics, these results establish spacer-layer engineering as an effective strategy for regulating ultrafast energy flow in layered excitonic semiconductors.",
  "abstract_shown": true,
  "affiliations": [
    "Division of Chemical Physics and NanoLund, Lund University Box 124 22100 Lund Sweden tonu.pullerits@chem.lu.se supriya.ghosh@kuleuven.be +46 46 222 81 31 +32 466 34 44 34.",
    "Department of Chemistry, KU Leuven Celestijnenlaan 200F 3001 Heverlee Belgium bapi.pradhan@kuleuven.be +32 465 43 23 04.",
    "Institute of Inorganic Chemistry, Graz University of Technology Stremayrgasse 9/IV Graz 8010 Austria.",
    "Department of Physics, College of Science, United Arab Emirates University P.O. Box 15551 Al Ain United Arab Emirates.",
    "Fakultät Physik/DELTA, Technische Universität Dortmund 44221 Dortmund Germany.",
    "Max Planck Institute for Polymer Research Ackermannweg 10 55128 Mainz Germany johan.hofkens@kuleuven.be +32 16 32 78 04."
  ],
  "article_type": "research article",
  "arxiv": null,
  "author_total": 9,
  "authors": [
    {
      "affs": [
        0,
        1
      ],
      "name": "Supriya Ghosh",
      "orcid": "0000-0003-1587-6024"
    },
    {
      "affs": [
        1
      ],
      "name": "Peiran Wang",
      "orcid": "0009-0006-8603-1474"
    },
    {
      "affs": [
        2
      ],
      "name": "Heinz Amenitsch",
      "orcid": "0000-0002-0788-1336"
    },
    {
      "affs": [
        2
      ],
      "name": "Sumea Klokic",
      "orcid": "0000-0001-8169-6350"
    },
    {
      "affs": [
        0,
        3
      ],
      "name": "Pavel Chabera",
      "orcid": "0000-0002-0531-5138"
    },
    {
      "affs": [
        4
      ],
      "name": "Christian Sternemann",
      "orcid": "0000-0001-9415-1106"
    },
    {
      "affs": [
        1
      ],
      "name": "Bapi Pradhan",
      "orcid": "0000-0002-6202-7343"
    },
    {
      "affs": [
        1,
        5
      ],
      "name": "Johan Hofkens",
      "orcid": "0000-0002-9101-0567"
    },
    {
      "affs": [
        0
      ],
      "name": "Tönu Pullerits",
      "orcid": "0000-0003-1428-5564"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/88ar8zfdc0xp5.bib",
  "cited_by": 0,
  "doi": "10.1039/d6sc06761a",
  "fulltext_url": "https://europepmc.org/articles/PMC13679185",
  "id": "88ar8zfdc0xp5",
  "issns": [
    "2041-6520",
    "2041-6539"
  ],
  "landing_url": "https://europepmc.org/article/MED/42899127",
  "language": "eng",
  "licence": "CC-BY",
  "licence_label": "CC BY",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "2208|Perovskite Materials and Applications"
    ]
  ],
  "openalex": "W7221675591",
  "pdf_url": "https://europepmc.org/articles/PMC13679185?pdf=render",
  "pmcid": "PMC13679185",
  "pmid": "42899127",
  "published": "2026-10-13",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/88ar8zfdc0xp5.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:19:33Z",
      "native_id": "MED:42899127",
      "source": "europepmc",
      "url": "https://europepmc.org/article/MED/42899127"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "journal-openalex:1605|Supramolecular Chemistry and Complexes",
      "subfield": "organic"
    }
  ],
  "title": "Ultrafast interphase exciton funneling in alternating-cation 2D perovskites through Förster-type energy transfer.",
  "title_text": "Ultrafast interphase exciton funneling in alternating-cation 2D perovskites through Förster-type energy transfer.",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:19:33Z",
  "url": "https://research.draconitic.com/paper/88ar8zfdc0xp5",
  "venue": "Chemical science",
  "versions": []
}