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Complementarity fusion of boron-oxygen and carbazole blocks enables narrowband blue OLEDs with high performance

Author

Listed:
  • Guo Yuan

    (Soochow University, Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM))

  • Yan-Chun Wang

    (Soochow University, Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM))

  • Zhen Zhang

    (East China Normal University, School of Physics and Electronic Science)

  • Jun-Yu Liu

    (Soochow University, Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM))

  • Yi-Hui He

    (East China Normal University, School of Physics and Electronic Science)

  • Guo-Wei Chen

    (Macau University of Science and Technology, Macao Institute of Materials Science and Engineering (MIMSE), Faculty of Innovation Engineering (FIE))

  • Yan-Qing Li

    (East China Normal University, School of Physics and Electronic Science)

  • Jian-Xin Tang

    (Soochow University, Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM)
    Macau University of Science and Technology, Macao Institute of Materials Science and Engineering (MIMSE), Faculty of Innovation Engineering (FIE))

Abstract

The development of ultra-high-definition organic light-emitting diodes (OLEDs) displays requires efficient and narrowband blue emission. Nevertheless, binary host-guest doped narrowband blue OLEDs still face significant challenges in simultaneously realizing high efficiency and negligible roll-off. Herein, a molecular construction strategy through the synergistic interplay between π-conjugation extension and functional complementarity fusion is proposed by incorporating a rigid boron-oxygen (BO) framework with carbazole building blocks. The constructed compounds exhibit increased triplet exciton recycling capability, high excited-state energy levels, and improved charge transporting features, showcasing significant potential as host matrices for blue devices. The sensitizer-free OLEDs achieve the narrowband blue emission with a CIEy value lower than 0.15, a maximum external quantum efficiency of 41.2%, and the suppressed efficiency roll-off at high luminance due to efficient energy transfer to blue guest emitters and elevated horizontal dipole orientation. This work strategically demonstrates a balance between high efficiency and reduced efficiency roll-off in binary narrowband blue OLEDs, representing a substantial advancement in blue electroluminescent technology.

Suggested Citation

  • Guo Yuan & Yan-Chun Wang & Zhen Zhang & Jun-Yu Liu & Yi-Hui He & Guo-Wei Chen & Yan-Qing Li & Jian-Xin Tang, 2025. "Complementarity fusion of boron-oxygen and carbazole blocks enables narrowband blue OLEDs with high performance," Nature Communications, Nature, vol. 16(1), pages 1-11, December.
    • Handle: RePEc:nat:natcom:v:16:y:2025:i:1:d:10.1038_s41467-025-65446-z
    DOI: 10.1038/s41467-025-65446-z
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