Thursday, May 2025

10:00 AM - 10:20 AM

Room: LL20BC

Session: OLED Emissive Material

Highly Efficient and Stable Pure Green Phosphor-Sensitized MR-TADF Emitter for B.T.2020 Color Top-Emission OLEDs

Student

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  Professor

  Jang Hyuk Kwon , PhD

  Kyung Hee University

Description:

In this work, we report a novel green MR-TADF emitter KHU-GD by incorporating naphthalene units to the triazine acceptor, by attaching modified triazine acceptor to the para of MR core. The synthesized material exhibited a narrow FWHM of 22 nm within the pure green region. The optimized exciplex host assisted phosphor-sensitized system with KHU-GD emitter resulting in high EQE of 29.3% and an extended operating lifetime (LT95) of 6,019 h at an initial luminance of 1,000 cd/m2. Furthermore, the fabricated top emission OLED with KHU-GD showed pure green emission with narrow FWHM of 20 nm and corresponding CIE coordinates of (0.19, 0.76) approaching BT.2020 requirements.