{
  "abstract": "Multi-resonant thermally activated delayed fluorescence (MR-TADF) emitters offer an attractive solution for the fabrication of colour-saturated organic light-emitting diodes (OLEDs). Still, their rigid frameworks often lead to slow reverse intersystem crossing and aggregation-caused quenching. To address these challenges and simultaneously introduce chiroptical properties in solution-processable materials, here we present the first examples of chiral intramolecular Förster resonance energy transfer (FRET) MR-TADF dendrimers, CzPBN-CzBN and CzPBA-CzBN. These emitters combine an MR-TADF core with chiral paracyclophane (CzP)-based donor dendrons linked to different acceptor units, benzonitrile for CzPBN-CzBN and benzoic acid for CzPBA-CzBN. While both dendrimers show narrowband TADF emission, the nature of the acceptor impacts their chiroptical properties. Specifically, CzPBA-CzBN exhibits circularly polarised luminescence (CPL), whereas CzPBN-CzBN does not due to a weaker circular dichroism signal. Conversely, in solution-processed hyperfluorescent (HF) OLEDs, the device with CzPBN-CzBN achieved a superior maximum external quantum efficiency (EQEmax) of 19.7% and lower efficiency roll-off (EQE of 18.9% at 1000 cd m‑2) compared to the device with CzPBA-CzBN (EQEmax/1000 = 17.2/16.5%). These findings reveal an intrinsic trade-off between CPL response and HF device performance, demonstrating how precise modulation of the excited-state manifold via acceptor engineering can be used to tailor the properties of intramolecular sensitised TADF emitters.",
  "abstract_shown": true,
  "affiliations": [
    "Organic Semiconductor Centre, EaStCHEM School of Chemistry, University of St Andrews St Andrews KY16 9ST UK",
    "Institute of Functional Nano & Soft Materials (FUNSOM), Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University Suzhou Jiangsu 21523 P. R. China",
    "University of Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) – UMR 6226 F-35000 Rennes France",
    "Institute of Organic Chemistry (IOC), Karlsruhe Institute of Technology (KIT) Kaiserstraße 12 76131 Karlsruhe Germany",
    "Institute of Biological and Chemical Systems (IBCS-FMS), Karlsruhe Institute of Technology (KIT) Kaiserstraße 12 76131 Karlsruhe Germany"
  ],
  "article_type": "research article",
  "arxiv": null,
  "author_total": 10,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Mahni Fatahi",
      "orcid": "0000-0003-4874-0246"
    },
    {
      "affs": [
        0
      ],
      "name": "Yan Xu"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Dongyang Chen"
    },
    {
      "affs": [
        0
      ],
      "name": "Praveen Choudhary",
      "orcid": "0000-0002-1291-0832"
    },
    {
      "affs": [
        2
      ],
      "name": "Jhon Sebastian Oviedo Ortiz"
    },
    {
      "affs": [
        3
      ],
      "name": "Jasmin Seibert",
      "orcid": "0000-0003-2869-350X"
    },
    {
      "affs": [
        3,
        4
      ],
      "name": "Stefan Bräse",
      "orcid": "0000-0003-4845-3191"
    },
    {
      "affs": [
        2
      ],
      "name": "Jeanne Crassous",
      "orcid": "0000-0002-4037-6067"
    },
    {
      "affs": [
        1
      ],
      "name": "Xiao-Hong Zhang",
      "orcid": "0000-0002-6732-2499"
    },
    {
      "affs": [
        0
      ],
      "name": "Eli Zysman-Colman",
      "orcid": "0000-0001-7183-6022"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/6wc9qznv6c1b9.bib",
  "cited_by": 0,
  "doi": "10.1039/d6sc04906k",
  "fulltext_url": "https://pmc.ncbi.nlm.nih.gov/articles/PMC13552525/",
  "id": "6wc9qznv6c1b9",
  "issns": [
    "2041-6520",
    "2041-6539"
  ],
  "landing_url": "https://hal.science/hal-05742046v1",
  "language": "en",
  "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": [
    [
      "hal",
      "0.chim"
    ],
    [
      "hal",
      "1.chim.orga"
    ],
    [
      "heading",
      "Chemistry"
    ],
    [
      "openalex",
      "2208|Organic Light-Emitting Diodes Research"
    ]
  ],
  "openalex": "W7207525212",
  "pdf_url": "https://hal.science/hal-05742046/document",
  "pmcid": "PMC13552525",
  "pmid": "42713521",
  "published": "2026-09-03",
  "publisher": "The Royal Society of Chemistry",
  "ris": "https://research.draconitic.com/paper/6wc9qznv6c1b9.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:58Z",
      "native_id": "hal-05742046",
      "source": "hal",
      "url": "https://hal.science/hal-05742046v1"
    },
    {
      "first_seen": "2026-10-31T12:23:45Z",
      "native_id": "PMC13552525",
      "source": "pmc",
      "url": "https://doi.org/10.1039/d6sc04906k"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "hal:1.chim.orga",
      "subfield": "organic"
    }
  ],
  "title": "Tuning Chiroptical Properties and Device Hyperfluorescence Efficiency via Acceptor Modification in an Intramolecularly Sensitised TADF Dendrimer",
  "title_text": "Tuning Chiroptical Properties and Device Hyperfluorescence Efficiency via Acceptor Modification in an Intramolecularly Sensitised TADF Dendrimer",
  "type": "peer-reviewed",
  "updated_at": "2026-11-01T12:20:53Z",
  "url": "https://research.draconitic.com/paper/6wc9qznv6c1b9",
  "venue": "Chemical Science",
  "versions": []
}