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Sensitizer plays a crucial role in the performance of HF devices. However, designing sensitizers with simultaneous high photoluminescence quantum yield (PLQY), rapid radiative decay (\n                    <jats:italic>k<\/jats:italic>\n                    <jats:sub>r<\/jats:sub>\n                    ), and fast reverse intersystem crossing rate (\n                    <jats:italic>k<\/jats:italic>\n                    <jats:sub>RISC<\/jats:sub>\n                    ) poses a great challenge, particularly for the thermally activated delayed fluorescence (TADF) sensitizers targeting deep\u2010blue HF device. Herein, by introducing a boron\u2010containing multi\u2010resonance\u2010type acceptor into the multi\u2010\n                    <jats:italic>tert<\/jats:italic>\n                    \u2010butyl\u2010carbazole encapsulated benzene molecular skeleton, two TADF emitters featuring hybridized multi\u2010channel charge\u2010transfer pathways, including short\u2010range multi\u2010resonance, weakened through\u2010bond, and compact face\u2010to\u2010face through\u2010space charge\u2010transfer. Benefiting from the rational molecular design, the proof\u2010of\u2010concept sensitizers exhibit simultaneous rapid\n                    <jats:italic>k<\/jats:italic>\n                    <jats:sub>r<\/jats:sub>\n                    of 5.3 \u00d7 10\n                    <jats:sup>7<\/jats:sup>\n                    s\n                    <jats:sup>\u22121<\/jats:sup>\n                    , fast\n                    <jats:italic>k<\/jats:italic>\n                    <jats:sub>RISC<\/jats:sub>\n                    up to 5.9 \u00d7 10\n                    <jats:sup>5<\/jats:sup>\n                    s\n                    <jats:sup>\u22121<\/jats:sup>\n                    , a PQLY of near\u2010unity, as well as ideal deep\u2010blue emission in both solution and film. Consequently, the corresponding deep\u2010blue HF devices not only achieve chromaticity coordinates that fully comply with the latest BT. 2020 standards, but also showcase record\u2010high maximum external quantum efficiencies nearing 40%, along with suppressed efficiency roll\u2010off.\n                  <\/jats:p>","DOI":"10.1002\/adma.202419601","type":"journal-article","created":{"date-parts":[[2025,2,12]],"date-time":"2025-02-12T01:27:35Z","timestamp":1739323655000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":54,"title":["Deep\u2010Blue OLEDs with BT. 2020 Blue Gamut, External Quantum Efficiency Approaching 40%"],"prefix":"10.1002","volume":"37","author":[{"given":"Zhengqi","family":"Xiao","sequence":"first","affiliation":[{"name":"Shenzhen Key Laboratory of New Information Display and Storage Materials College of Materials Science and Engineering Shenzhen University  Shenzhen 518060 China"},{"name":"State Key Laboratory of Fine Chemicals Dalian University of Technology  Dalian 116024 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9291-0586","authenticated-orcid":false,"given":"Yang","family":"Zou","sequence":"additional","affiliation":[{"name":"Shenzhen Key Laboratory of New Information Display and Storage Materials College of Materials Science and Engineering Shenzhen University  Shenzhen 518060 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zhanxiang","family":"Chen","sequence":"additional","affiliation":[{"name":"Shenzhen Key Laboratory of New Information Display and Storage Materials College of Materials Science and Engineering Shenzhen University  Shenzhen 518060 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jingsheng","family":"Miao","sequence":"additional","affiliation":[{"name":"Shenzhen Key Laboratory of New Information Display and Storage Materials College of Materials Science and Engineering Shenzhen University  Shenzhen 518060 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yuntao","family":"Qiu","sequence":"additional","affiliation":[{"name":"Shenzhen Key Laboratory of New Information Display and Storage Materials College of Materials Science and Engineering Shenzhen University  Shenzhen 518060 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zhongyan","family":"Huang","sequence":"additional","affiliation":[{"name":"Shenzhen Key Laboratory of New Information Display and Storage Materials College of Materials Science and Engineering Shenzhen University  Shenzhen 518060 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiaosong","family":"Cao","sequence":"additional","affiliation":[{"name":"Shenzhen Key Laboratory of New Information Display and Storage Materials College of Materials Science and Engineering Shenzhen University  Shenzhen 518060 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiaojun","family":"Peng","sequence":"additional","affiliation":[{"name":"Shenzhen Key Laboratory of New Information Display and Storage Materials College of Materials Science and Engineering Shenzhen University  Shenzhen 518060 China"},{"name":"State Key Laboratory of Fine Chemicals Dalian University of Technology  Dalian 116024 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9337-3460","authenticated-orcid":false,"given":"Chuluo","family":"Yang","sequence":"additional","affiliation":[{"name":"Shenzhen Key Laboratory of New Information Display and Storage Materials College of Materials Science and Engineering Shenzhen University  Shenzhen 518060 China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2025,2,11]]},"reference":[{"key":"e_1_2_7_1_1","doi-asserted-by":"publisher","DOI":"10.1002\/adom.202201714"},{"key":"e_1_2_7_1_2","doi-asserted-by":"publisher","DOI":"10.1002\/adfm.201908677"},{"key":"e_1_2_7_1_3","doi-asserted-by":"publisher","DOI":"10.1039\/D3CS00837A"},{"key":"e_1_2_7_2_1","author":"Wu Z. 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