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In this study, we report a space\u2010confined triplet\u2010scavenging strategy that spatially couples an anthracene\u2010based triplet\u2010scavenging unit to the MR core while electronically decoupling them. This architecture enables efficient triplet dissipation without disturbing the intrinsic singlet emission of the MR\u2010core. Therefore, the proposed BCzBN\u2010SF1An preserves narrowband blue emission and high photoluminescence quantum yield, while exhibiting an enlarged singlet\u2010triplet splitting and suppressed delayed emission, consistent with triplet scavenging effect. In hyperfluorescent (HF) OLEDs, BCzBN\u2010SF1An exhibits a maximum EQE of 22.2% with a significantly reduced efficiency roll\u2010off. Notably, the device lifetime is extended to 127\u00a0h at LT\n                    <jats:sub>80<\/jats:sub>\n                    , a threefold improvement over the parent BCzBN\u2010based device, without sacrificing color purity or efficiency. Transient electroluminescent measurements further reveal suppressed charge trapping and the elimination of delayed emission from TEs, highlighting the synergistic roles of triplet scavenging and optimized charge carrier dynamics. This work demonstrates comprehensive insights into carrier\/exciton dynamics, along with an effective molecular design paradigm for simultaneously achieving high efficiency and long operational lifetime in blue HF\u2010OLEDs through precise triplet exciton management.\n                  <\/jats:p>","DOI":"10.1002\/anie.7332846","type":"journal-article","created":{"date-parts":[[2026,7,24]],"date-time":"2026-07-24T11:05:18Z","timestamp":1784891118000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Efficient and Long\u2010Lived Blue OLEDs by Space\u2010Confined Triplet Scavenging Modulation in Terminal Emitters"],"prefix":"10.1002","volume":"65","author":[{"given":"Sugarmaa","family":"Altankhuyag","sequence":"first","affiliation":[{"name":"Center For Organic Photonics and Electronics Research (OPERA) Kyushu University  Nishi\u2010ku Fukuoka Japan"},{"name":"Department of Applied Chemistry Kyushu University  Nishi\u2010ku Fukuoka Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0005-0574-3596","authenticated-orcid":false,"given":"Qi","family":"Zheng","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Bioinspired Interfacial Materials Science Institute of Functional Nano &amp; Soft Materials (FUNSOM) Joint International Research Laboratory of Carbon\u2010Based Functional Materials and Devices Soochow University  Suzhou Jiangsu P. 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