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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\n                    <jats:sub>x,y<\/jats:sub>\n                    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\n                    <jats:sub>y<\/jats:sub>\n                    up to 0.74. In hyperfluorescent device architecture, the CIE\n                    <jats:sub>x<\/jats:sub>\n                    s further meet the x-coordinate requirements, i.e., NTSC (0.21) and BT. 2020 (0.17), while keeping their CIE\n                    <jats:sub>y<\/jats:sub>\n                    s\u2009~\u20090.7. Most importantly, hyperfluorescent devices display the high maximum external quantum efficiencies of over 25% and maximum luminance of over 10\n                    <jats:sup>5<\/jats:sup>\n                    \u2009cd\u2009m\n                    <jats:sup>\u22122<\/jats:sup>\n                    with suppressed rolloffs (external quantum efficiency of ~20% at 10\n                    <jats:sup>4<\/jats:sup>\n                    \u2009cd\u2009m\n                    <jats:sup>\u22122<\/jats:sup>\n                    ) and long device stabilities with LT\n                    <jats:sub>95<\/jats:sub>\n                    s of ~ 600\u2009h.\n                  <\/jats:p>","DOI":"10.1038\/s41467-024-47482-3","type":"journal-article","created":{"date-parts":[[2024,4,12]],"date-time":"2024-04-12T04:01:48Z","timestamp":1712894508000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":93,"title":["Bright, efficient, and stable pure-green hyperfluorescent organic light-emitting diodes by judicious molecular design"],"prefix":"10.1038","volume":"15","author":[{"given":"Yi-Ting","family":"Lee","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7721-9244","authenticated-orcid":false,"given":"Chin-Yiu","family":"Chan","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nanami","family":"Matsuno","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shigetada","family":"Uemura","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Susumu","family":"Oda","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Masakazu","family":"Kondo","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rangani Wathsala","family":"Weerasinghe","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yanmei","family":"Hu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gerardus N. 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