Multi-resonance terminal emitters towards narrowband, high-efficiency, and stable hyperfluorescence organic light-emitting diodes

Yi-Ting Lee; Chin-Yiu Chan; Masaki Tanaka; Masashi Mamada; Kenichi Goushi; Xun Tang; Youichi Tsuchiya; Hajime Nakanotani; Chihaya Adachi

doi:10.1117/12.2652241

14 March 2023 Multi-resonance terminal emitters towards narrowband, high-efficiency, and stable hyperfluorescence organic light-emitting diodes

Yi-Ting Lee, Chin-Yiu Chan, Masaki Tanaka, Masashi Mamada, Kenichi Goushi, Xun Tang, Youichi Tsuchiya, Hajime Nakanotani, Chihaya Adachi

Author Affiliations +

Proceedings Volume PC12443, Advances in Display Technologies XIII; PC1244305 (2023) https://doi.org/10.1117/12.2652241
Event: SPIE OPTO, 2023, San Francisco, California, United States

Abstract

Multi-Resonance Emitters (MREs) are a promising candidate for fulfilling the harsh requirements of display applications due to their unique photophysical properties. Recently, MREs have been widely used as a Terminal Emitter (TE) in Hyper Fluorescence Organic Light-Emitting Diodes (HF-OLEDs); however, since MREs are always TADF-active, possessing long triplet lifetimes in milli-second order, they result in severe chemical degradation. The device lifetime of blue OLED is still a challenge. Here, instead of shortening the delayed lifetime of MREs by molecular design, we introduced a low-triplet pyrene unit into an MRE scaffold to achieve narrowband emission and quick removal of triplets in MREs simultaneously. Blue HF-OLED based on the non-TADF MRE demonstrated a high external quantum efficiency (EQE) of 20% and a ten-fold improvement in stability, compared to those of the HF-OLEDs with standard MREs.

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Yi-Ting Lee, Chin-Yiu Chan, Masaki Tanaka, Masashi Mamada, Kenichi Goushi, Xun Tang, Youichi Tsuchiya, Hajime Nakanotani, and Chihaya Adachi "Multi-resonance terminal emitters towards narrowband, high-efficiency, and stable hyperfluorescence organic light-emitting diodes ", Proc. SPIE PC12443, Advances in Display Technologies XIII, PC1244305 (14 March 2023); https://doi.org/10.1117/12.2652241

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