biostudies-literatureLee YTMEXT | Japan Society for the Promotion of ScienceMEXT | Japan Science and Technology Agency (JST)the City University of Hong KongMEXT | Japan Society for the Promotion of Science (JSPS)the National Science and Technology CouncilMEXT | Japan Science and Technology Agency3174https://www.ebi.ac.uk/biostudies/studies/S-EPMC11014922biostudies-literatureUnknown15(1)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,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 CIE_y up to 0.74. In hyperfluorescent device architecNature communicationsBright, efficient, and stable pure-green hyperfluorescent organic light-emitting diodes by judicious molecular design.PMC11014922JPMJCR22B3JPJSCCA2018000523H05406Lee YTHu YUemura SChan CYMatsuno NAdachi CTsuchiya YLestanto GNILi YOda SWeerasinghe RWKondo MHatakeyama TfalseBright, efficient, and stable pure-green hyperfluorescent organic light-emitting diodes by judicious molecular design.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,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 CIE_y up to 0.74. In hyperfluorescent device architec2024-01-01T00:00:00Z2024 Apr2025-04-26T20:11:07.103Z2025-04-06T16:20:05.488ZS-EPMC110149223860936410.1038/s41467-024-47482-3