{
  "abstract": "Two new host materials, 3-(3-(2,12-di-tert-butyl-5,9-dioxa-13b-boranaphtho[3,2,1-de]anthracen-7-yl)phenyl)pyridine (TDBA-Py) and 3,3′-(5-(2,12-di-tert-butyl-5,9-dioxa-13b-boranaphtho[3,2,1-de]anthracen-7-yl)-1,3-phenylene)dipyridine (TDBA-dPy), were designed and synthesized by introducing one pyridine unit at the meta position and two pyridine units at the 3,5-positions, respectively, of the terminal phenyl ring of the TDBA core, a 5,9-dioxa-13b-boranaphtho[3,2,1-de]anthracene (DOBNA)-based multiple-resonance framework, and the resulting changes in their properties were analyzed. By controlling the number of pyridine substituents at the meta positions of a single phenyl ring, the extension of intramolecular conjugation was suppressed, which maintained a high triplet energy (T1 ≥ 2.76 eV) and the emission wavelength and simultaneously improved the electron-injection properties. In the devices employing ν-DABNA as the dopant, the TDBA-Py-based device exhibited a low turn-on voltage of 2.5 V, a maximum power efficiency (PEmax) of 10.9 lm W−1, and a maximum current efficiency (CEmax) of 12.5 cd A−1, which can be attributed to its lowered lowest unoccupied molecular orbital (LUMO) level. These results demonstrate that introducing appropriate electron-accepting character through single pyridine substitution is an effective host-design strategy for improving device efficiency.",
  "abstract_shown": true,
  "affiliations": [
    "Integrated Engineering, Department of Chemical Engineering, Kyung Hee University, Yongin-si 17104, Gyeonggi-do, Republic of Korea"
  ],
  "article_type": "research article",
  "arxiv": null,
  "author_total": 7,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Jeongmin Han"
    },
    {
      "affs": [
        0
      ],
      "name": "Sangwook Park",
      "orcid": "0009-0000-1936-5104"
    },
    {
      "affs": [
        0
      ],
      "name": "Saeyoung Oh",
      "orcid": "0009-0007-8177-0056"
    },
    {
      "affs": [
        0
      ],
      "name": "Hyeonho Park"
    },
    {
      "affs": [
        0
      ],
      "name": "Kiho Lee",
      "orcid": "0000-0003-3549-631X"
    },
    {
      "affs": [
        0
      ],
      "name": "Hayoon Lee"
    },
    {
      "affs": [
        0
      ],
      "name": "Jongwook Park",
      "orcid": "0000-0002-6797-5211"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/15x8hdcyfh03p.bib",
  "cited_by": 0,
  "doi": "10.3390/molecules31203768",
  "fulltext_url": "https://europepmc.org/articles/PMC13707410",
  "id": "15x8hdcyfh03p",
  "issns": [
    "1420-3049"
  ],
  "landing_url": "https://www.mdpi.com/1420-3049/31/20/3768",
  "language": "eng",
  "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": [
    [
      "openalex",
      "2208|Organic Light-Emitting Diodes Research"
    ]
  ],
  "openalex": "W7223035584",
  "pdf_url": "https://europepmc.org/articles/PMC13707410?pdf=render",
  "pmcid": "PMC13707410",
  "pmid": "42943836",
  "published": "2026-10-20",
  "publisher": "MDPI AG",
  "ris": "https://research.draconitic.com/paper/15x8hdcyfh03p.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:18:42Z",
      "native_id": "10.3390/molecules31203768",
      "source": "crossref",
      "url": "https://www.mdpi.com/1420-3049/31/20/3768"
    },
    {
      "first_seen": "2026-10-30T12:22:12Z",
      "native_id": "MED:42943836",
      "source": "europepmc",
      "url": "https://europepmc.org/article/MED/42943836"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "issn:1420-3049",
      "subfield": "general"
    }
  ],
  "title": "Meta-Pyridyl Substitution for New Blue Host Materials with Enhanced Thermal Stability and Electron-Injection Properties",
  "title_text": "Meta-Pyridyl Substitution for New Blue Host Materials with Enhanced Thermal Stability and Electron-Injection Properties",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:22:12Z",
  "url": "https://research.draconitic.com/paper/15x8hdcyfh03p",
  "venue": "Molecules",
  "versions": []
}