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In this study, we designed double boron\u2013oxygen\u2013nitrogen\u2010based polycyclic aromatic hydrocarbons (dBON\u2010PAHs) with rigid planar structures and developed a novel UV emitter, BO\u2010N, featuring hybridized local and charge\u2010transfer (HLCT) properties. BO\u2010N exhibited UV emission in toluene solution and 1,3\u2010di(9\n                    <jats:italic>H<\/jats:italic>\n                    \u2010carbazol\u20109\u2010yl)benzene (mCP) film, with photoluminescence (PL) peaks of 391 and 400\u00a0nm and narrow full width at half\u2010maximum (FWHM) values of 15 and 34\u00a0nm, respectively. The device doped with 5 wt% BO\u2010N achieved a narrowband UV emission with an FWHM of 37\u00a0nm, an electroluminescence peak (\n                    <jats:italic>\u03bb<\/jats:italic>\n                    <jats:sub>EL<\/jats:sub>\n                    ) of 399\u00a0nm, and CIE coordinates of (0.166, 0.030). Moreover, the device attained a record\u2010high maximum external quantum efficiency (EQE\n                    <jats:sub>max<\/jats:sub>\n                    ) of 18.6% among reported HLCT\u2010based UV OLEDs with CIE\n                    <jats:sub>y<\/jats:sub>\n                    &lt;\u00a00.05. These findings highlight the great potential of double BON\u2010PAHs as robust emitters for high\u2010performance UV OLEDs.\n                  <\/jats:p>","DOI":"10.1002\/anie.202505328","type":"journal-article","created":{"date-parts":[[2025,4,1]],"date-time":"2025-04-01T05:37:40Z","timestamp":1743485860000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":32,"title":["A High\u2010Efficiency Ultraviolet Organic Light\u2010Emitting Diode Employing a Double Boron\u2013Oxygen\u2013Nitrogen\u2010Based Emitter"],"prefix":"10.1002","volume":"64","author":[{"given":"Feng","family":"Zhan","sequence":"first","affiliation":[{"name":"State Key Laboratory of Green\u2010Chemical Synthesis and Conversion Technology College of Chemical Engineering Zhejiang University of Technology  Hangzhou 310014 P.R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kewei","family":"Xu","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Green\u2010Chemical Synthesis and Conversion Technology College of Chemical Engineering Zhejiang University of Technology  Hangzhou 310014 P.R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Taiju","family":"Tsuboi","sequence":"additional","affiliation":[{"name":"Department of Polymer Science and Engineering Zhejiang University  Hangzhou 310027 P.R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yuanbin","family":"She","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Green\u2010Chemical Synthesis and Conversion Technology College of Chemical Engineering Zhejiang University of Technology  Hangzhou 310014 P.R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Guijie","family":"Li","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Green\u2010Chemical Synthesis and Conversion Technology College of Chemical Engineering Zhejiang University of Technology  Hangzhou 310014 P.R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2025,4,7]]},"reference":[{"key":"e_1_2_8_1_1","doi-asserted-by":"publisher","DOI":"10.1038\/25954"},{"key":"e_1_2_8_2_1","doi-asserted-by":"publisher","DOI":"10.1038\/nature11687"},{"key":"e_1_2_8_3_1","doi-asserted-by":"publisher","DOI":"10.1038\/ncomms6008"},{"key":"e_1_2_8_4_1","doi-asserted-by":"publisher","DOI":"10.1002\/adma.201401759"},{"key":"e_1_2_8_5_1","doi-asserted-by":"publisher","DOI":"10.1038\/s41467-018-07482-6"},{"key":"e_1_2_8_6_1","doi-asserted-by":"publisher","DOI":"10.1038\/s41566-022-00958-4"},{"key":"e_1_2_8_7_1","doi-asserted-by":"publisher","DOI":"10.1002\/adma.200401476"},{"key":"e_1_2_8_8_1","doi-asserted-by":"publisher","DOI":"10.1088\/0022-3727\/41\/13\/133001"},{"key":"e_1_2_8_9_1","doi-asserted-by":"publisher","DOI":"10.1007\/s11517-007-0263-1"},{"key":"e_1_2_8_10_1","doi-asserted-by":"publisher","DOI":"10.1143\/JJAP.42.1110"},{"key":"e_1_2_8_11_1","doi-asserted-by":"publisher","DOI":"10.1002\/anie.202116810"},{"key":"e_1_2_8_12_1","doi-asserted-by":"publisher","DOI":"10.1002\/adma.202305310"},{"key":"e_1_2_8_13_1","doi-asserted-by":"publisher","DOI":"10.1002\/anie.202300492"},{"key":"e_1_2_8_14_1","author":"Zhang K.","year":"2024","journal-title":"Angew. 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