{
  "abstract": "Polymerized Y-type nonfullerene acceptors (PY-NFAs) have shown great promise for efficient and stable organic solar cells (OSCs), yet their excited-state dynamics and structure-photophysics-performance relationships remain unclear. Here, we investigate a series of PY-NFAs and distinguish between intrachain excitons (intra-Ex) and interchain excitons (inter-Ex) formed in the solid state using cryogenic transient absorption (TA) spectroscopy at 100 K. We identify the emergence of trapped intra-Ex in the PY-NFA films from approximately 100 ps onwards after photoexcitation. By comparing this low-temperature TA signal among different PY-NFA films, we uncover a strong correlation between the trapped intra-Ex signature and the performance of these PY-NFAs in donor-acceptor blend OSC devices. This correlation indicates that the low-temperature TA response provides a quantitative measure of structural disorder in the PY-NFA aggregates and in the corresponding donor-acceptor blends. Correlating these spectroscopic results with molecular packing and morphological data, we reveal that high-performance PY-NFAs simultaneously exhibit (1) extended backbone conjugation and large intrachain exciton bandwidths and (2) uniform, oriented interchain packing despite moderately increased - stacking distances. These findings provide new design rules for PY-NFAs and offer deeper insight into how structural disorder and exciton dynamics govern OSC performance.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": null,
  "author_total": 7,
  "authors": [
    {
      "name": "Yu Guo"
    },
    {
      "name": "Yuang Fu"
    },
    {
      "name": "Xianzhao Liu"
    },
    {
      "name": "Youcai Liang"
    },
    {
      "name": "Fei Huang"
    },
    {
      "name": "Xinhui Lu"
    },
    {
      "name": "Philip C.Y. Chow"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/7c68srmxrv6t3.bib",
  "cited_by": 0,
  "doi": "10.1103/fls9-jc34",
  "fulltext_url": null,
  "id": "7c68srmxrv6t3",
  "issns": [
    "2768-5608"
  ],
  "landing_url": "https://hal.science/hal-05793505v1",
  "language": "en",
  "licence": "CC-BY",
  "licence_label": "CC BY",
  "licence_source": "journal",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "hal",
      "0.chim"
    ],
    [
      "openalex",
      "2208|Organic Electronics and Photovoltaics"
    ]
  ],
  "openalex": "W7160105799",
  "pdf_url": null,
  "pmcid": null,
  "pmid": null,
  "published": "2026-06-08",
  "publisher": "American Physical Society",
  "ris": "https://research.draconitic.com/paper/7c68srmxrv6t3.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:54Z",
      "native_id": "hal-05793505",
      "source": "hal",
      "url": "https://hal.science/hal-05793505v1"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "journal-openalex:2505|Machine Learning in Materials Science",
      "subfield": "materials-polymers"
    }
  ],
  "title": "Balanced Intra- and Interchain Exciton Delocalization Enables Efficient All-Polymer Solar Cells",
  "title_text": "Balanced Intra- and Interchain Exciton Delocalization Enables Efficient All-Polymer Solar Cells",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:17:54Z",
  "url": "https://research.draconitic.com/paper/7c68srmxrv6t3",
  "venue": "PRX Energy",
  "versions": []
}