Wide-Range Color Tuning of Narrowband Emission in Multi-resonance Organoboron Delayed Fluorescence Materials through Rational Imine/Amine Functionalization

Minlang Yang, So Shikita, Hyukgi Min, In Seob Park, Hiromoto Shibata, Natsuki Amanokura, Takuma Yasuda

    Research output: Contribution to journalArticlepeer-review

    132 Citations (Scopus)

    Abstract

    Establishing a simple and versatile design strategy to finely modulate emission colors while retaining high luminescence efficiency and color purity remains an appealing yet challenging task for the development of multi-resonance-induced thermally activated delayed fluorescence (MR-TADF) materials. Herein, we demonstrate that the strategic introduction of electron-withdrawing imine and electron-donating amine moieties into a versatile boron-embedded 1,3-bis(carbazol-9-yl)benzene skeleton enables systematic hypsochromic and bathochromic shifts of narrowband emissions, respectively. By this method, effective electroluminescence color tuning was accomplished over a wide visible range from deep-blue to yellow (461–571 nm), using the same MR molecular system, without compromising very narrow spectral features. Deep-blue to yellow organic light-emitting diodes with maximum external quantum efficiencies as high as 19.0–29.2 % and superb color purity could be produced with this family of color-tunable MR-TADF emitters.

    Original languageEnglish
    Pages (from-to)23142-23147
    Number of pages6
    JournalAngewandte Chemie - International Edition
    Volume60
    Issue number43
    DOIs
    Publication statusPublished - Oct 18 2021

    All Science Journal Classification (ASJC) codes

    • Catalysis
    • General Chemistry

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