Bright, efficient, and stable pure-green hyperfluorescent organic light-emitting diodes by judicious molecular design.

Autor: Lee YT; Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, Motooka, Nishi, Fukuoka, Japan.; Department of Chemistry, Soochow University, Taipei, ROC, Taiwan., Chan CY; Department of Materials Science and Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR, China. chinychan2@cityu.edu.hk.; Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR, China. chinychan2@cityu.edu.hk., Matsuno N; Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto, Japan., Uemura S; Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto, Japan., Oda S; Department of Applied Chemistry, Graduate School of Science and Engineering, Toyo University, Kawagoe, Saitama, Japan., Kondo M; JNC Co., Ltd. 5-1 Goikaigan, Ichihara, Chiba, Japan., Weerasinghe RW; Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, Motooka, Nishi, Fukuoka, Japan., Hu Y; Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, Motooka, Nishi, Fukuoka, Japan., Lestanto GNI; Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, Motooka, Nishi, Fukuoka, Japan., Tsuchiya Y; Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, Motooka, Nishi, Fukuoka, Japan., Li Y; Department of Materials Science and Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR, China.; Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR, China., Hatakeyama T; Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto, Japan. hatake@kuchem.kyoto-u.ac.jp., Adachi C; Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, Motooka, Nishi, Fukuoka, Japan. adachi@cstf.kyushu-u.ac.jp.; International Institute for Carbon Neutral Energy Research (WPI-I2CNER), Kyushu University, Nishi, Fukuoka, Japan. adachi@cstf.kyushu-u.ac.jp.
Jazyk: angličtina
Zdroj: Nature communications [Nat Commun] 2024 Apr 12; Vol. 15 (1), pp. 3174. Date of Electronic Publication: 2024 Apr 12.
DOI: 10.1038/s41467-024-47482-3
Abstrakt: To fulfill ultra-high-definition display, efficient and bright green organic light-emitting diodes with Commission Internationale de l'Éclairage y-coordinate ≥ 0.7 are required. Although there are some preceding reports of highly efficient devices based on pure-green multi-resonance emitters, the efficiency rolloff and device stabilities for those pure-green devices are still unsatisfactory. Herein, we report the rational design of two pure-green multi-resonance emitters for achieving highly stable and efficient pure-green devices with CIE x,y s that are close to the NTSC and BT. 2020 standards. In this study, our thermally activated delayed fluorescence OLEDs based on two pure-green multi-resonance emitters result in CIE y up to 0.74. In hyperfluorescent device architecture, the CIE x s further meet the x-coordinate requirements, i.e., NTSC (0.21) and BT. 2020 (0.17), while keeping their CIE y s ~ 0.7. Most importantly, hyperfluorescent devices display the high maximum external quantum efficiencies of over 25% and maximum luminance of over 10 5  cd m -2 with suppressed rolloffs (external quantum efficiency of ~20% at 10 4  cd m -2 ) and long device stabilities with LT 95 s of ~ 600 h.
(© 2024. The Author(s).)
Databáze: MEDLINE
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