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Design of ortho-Substituted Donor-Acceptor Molecules as Highly Efficient Green Thermally Activated Delayed Fluorescent Emitters

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Abstract

The ortho-substituted donor-acceptor molecules 2-(4,6-diphenyl-1, 3, 5-triazin-2-yl)-N,Ndiphenylaniline (DPA-o-Trz) and 2-(4,6-diphenyl-1, 3, 5-triazine-2-yl)-N,N-di-p-tolylaniline (MPA-o-Trz) were designed, synthesized, and found to exhibit green fluorescence characteristics. Notably, the singlet-triplet energy gap was less than 0.1 eV, indicating that reverse intersystem crossing gave rise to thermally activated delayed fluorescence (TADF). The organic light-emitting device performance of MPA-o-Trz showed a high external quantum efficiency of 16.3% and good color stability from 0.1 cd/m2 to 5000 cd/m2.

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Authors and Affiliations

  1. Department of Nanobiomedical Science and BK21 PLUS NBM Global Research Center, Dankook University, Cheonan, 31116, Korea

    Jae-Ryung Cha & Myoung-Seon Gong

  2. Department of Chemistry, Dankook University, Cheonan, 31116, Korea

    Tak Jae Lee, Tae Hoon Ha & Chil Won Lee

Authors
  1. Jae-Ryung Cha
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  2. Myoung-Seon Gong
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  3. Tak Jae Lee
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  4. Tae Hoon Ha
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  5. Chil Won Lee
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Correspondence to Chil Won Lee.

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Cha, JR., Gong, MS., Lee, T.J. et al. Design of ortho-Substituted Donor-Acceptor Molecules as Highly Efficient Green Thermally Activated Delayed Fluorescent Emitters. J. Korean Phys. Soc. 72, 873–879 (2018). https://doi.org/10.3938/jkps.72.873

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  • DOI: https://doi.org/10.3938/jkps.72.873

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