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High-efficiency and long-lifetime deep-blue phosphorescent OLEDs using deuterated exciplex-forming host

Author

Listed:
  • Wenbo Yuan

    (Department of Chemistry, Department of Chemistry, Tsinghua University)

  • Tianyu Huang

    (Department of Chemistry, Department of Chemistry, Tsinghua University)

  • Jianping Zhou

    (Department of Chemistry, Department of Chemistry, Tsinghua University)

  • Man-Chung Tang

    (Tsinghua University)

  • Dongdong Zhang

    (Department of Chemistry, Department of Chemistry, Tsinghua University)

  • Lian Duan

    (Department of Chemistry, Department of Chemistry, Tsinghua University
    Tsinghua University)

Abstract

A suitable host material is pivotal for efficient and stable deep-blue phosphorescent organic light-emitting diodes (PhOLEDs). Here, we construct a deuterated exciplex-forming host with improved molecular stability and charge transport and firstly unveil an “external deuteration effect” on dopant, which reduces the shoulder emissions for slightly blue-shifted colours and also accelerates the radiative decay rates for improved photoluminescence efficiency. The corresponding deep-blue PhOLEDs based on two platinum complexes, PtON-TBBI and PtON-tb-DTB, achieve lower operational voltages and higher maximum external quantum efficiencies of 27.4/19.9% and power efficiency of 41.2/33.6 lm/W, respectively, compared to the hydrogen-based counterparts. Moreover, lifetimes of 370 and 557 h to reach 90% of the initial luminance of 1000 cd/m2 with Commission Internationale de l’Eclairage coordinates of (0.148, 0.165) and (0.153, 0.213) are achieved, 1.6 and 1.4 times longer than the ones based on the non-deuterated hosts with even blue-shifted colours.

Suggested Citation

  • Wenbo Yuan & Tianyu Huang & Jianping Zhou & Man-Chung Tang & Dongdong Zhang & Lian Duan, 2025. "High-efficiency and long-lifetime deep-blue phosphorescent OLEDs using deuterated exciplex-forming host," Nature Communications, Nature, vol. 16(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:16:y:2025:i:1:d:10.1038_s41467-025-59583-8
    DOI: 10.1038/s41467-025-59583-8
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