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A platform for blue-luminescent carbon-centered radicals

Author

Listed:
  • Xin Li

    (Northwest University)

  • Yi-Lin Wang

    (Northwest University)

  • Chan Chen

    (Northwest University)

  • Yan-Yan Ren

    (Northwest University)

  • Ying-Feng Han

    (Northwest University)

Abstract

Organic radicals, which have unique doublet spin-configuration, provide an alternative method to overcome the efficiency limitation of organic light-emitting diodes (OLEDs) based on conventional fluorescent organic molecules. Further, they have made great breakthroughs in deep-red and near-infrared OLEDs. However, it is difficult to extend their fluorescence into a short-wavelength region because of the natural narrow bandgap of the organic radicals. Herein, we significantly expand the scope of luminescent radicals by showing a new platform of carbon-centered radicals derived from N-heterocyclic carbenes that produce blue to green emissions (444–529 nm). Time-dependent density functional theory calculations and experimental investigations disclose that the fluorescence originates from the high-energy excited states to the ground state, demonstrating an anti-Kasha behavior. The present work provides an efficient and modular approach toward a library of carbon-centered radicals that feature anti-Kasha’s rule emission, rendering them as potential new emitters in the short-wavelength region.

Suggested Citation

  • Xin Li & Yi-Lin Wang & Chan Chen & Yan-Yan Ren & Ying-Feng Han, 2022. "A platform for blue-luminescent carbon-centered radicals," Nature Communications, Nature, vol. 13(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-33130-1
    DOI: 10.1038/s41467-022-33130-1
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    References listed on IDEAS

    as
    1. Xin Ai & Emrys W. Evans & Shengzhi Dong & Alexander J. Gillett & Haoqing Guo & Yingxin Chen & Timothy J. H. Hele & Richard H. Friend & Feng Li, 2018. "Efficient radical-based light-emitting diodes with doublet emission," Nature, Nature, vol. 563(7732), pages 536-540, November.
    2. Matthew N. Hopkinson & Christian Richter & Michael Schedler & Frank Glorius, 2014. "An overview of N-heterocyclic carbenes," Nature, Nature, vol. 510(7506), pages 485-496, June.
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    Cited by:

    1. Amrita Goldar & Diya Dasgupta, 2023. "Beyond the Stocktake (Part II): Clean Energy Technologies," Indian Council for Research on International Economic Relations (ICRIER) Policy Paper 14, Indian Council for Research on International Economic Relations (ICRIER), New Delhi, India.

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