Author
Listed:
- Yi-Ting Lee
(Kyushu University, Motooka
Soochow University)
- Chin-Yiu Chan
(City University of Hong Kong, Tat Chee Avenue
City University of Hong Kong, Tat Chee Avenue)
- Nanami Matsuno
(Kyoto University)
- Shigetada Uemura
(Kyoto University)
- Susumu Oda
(Toyo University)
- Masakazu Kondo
(Ltd. 5-1 Goikaigan)
- Rangani Wathsala Weerasinghe
(Kyushu University, Motooka)
- Yanmei Hu
(Kyushu University, Motooka)
- Gerardus N. Iswara Lestanto
(Kyushu University, Motooka)
- Youichi Tsuchiya
(Kyushu University, Motooka)
- Yufang Li
(City University of Hong Kong, Tat Chee Avenue
City University of Hong Kong, Tat Chee Avenue)
- Takuji Hatakeyama
(Kyoto University)
- Chihaya Adachi
(Kyushu University, Motooka
Kyushu University)
Abstract
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 CIEx,ys 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 CIEy up to 0.74. In hyperfluorescent device architecture, the CIExs further meet the x-coordinate requirements, i.e., NTSC (0.21) and BT. 2020 (0.17), while keeping their CIEys ~ 0.7. Most importantly, hyperfluorescent devices display the high maximum external quantum efficiencies of over 25% and maximum luminance of over 105 cd m−2 with suppressed rolloffs (external quantum efficiency of ~20% at 104 cd m−2) and long device stabilities with LT95s of ~ 600 h.
Suggested Citation
Yi-Ting Lee & Chin-Yiu Chan & Nanami Matsuno & Shigetada Uemura & Susumu Oda & Masakazu Kondo & Rangani Wathsala Weerasinghe & Yanmei Hu & Gerardus N. Iswara Lestanto & Youichi Tsuchiya & Yufang Li & , 2024.
"Bright, efficient, and stable pure-green hyperfluorescent organic light-emitting diodes by judicious molecular design,"
Nature Communications, Nature, vol. 15(1), pages 1-9, December.
Handle:
RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-47482-3
DOI: 10.1038/s41467-024-47482-3
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