{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,24]],"date-time":"2026-10-24T15:16:50Z","timestamp":1792855010183,"version":"4.5.0"},"reference-count":68,"publisher":"Wiley","issue":"35","license":[{"start":{"date-parts":[[2024,6,25]],"date-time":"2024-06-25T00:00:00Z","timestamp":1719273600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Angew Chem Int Ed"],"published-print":{"date-parts":[[2024,8,26]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>\n                    Currently, much research effort has been devoted to improving the exciton utilization efficiency and narrowing the emission spectra of ultraviolet (UV) fluorophores for organic light\u2010emitting diode (OLED) applications, while almost no attention has been paid to optimizing their light out\u2010coupling efficiency. Here, we developed a linear donor\u2010acceptor\u2010donor (D\u2013A\u2013D) triad, namely CDFDB, which possesses high\u2010lying reverse intersystem crossing (hRISC) property. Thanks to its integrated narrowband UV photoluminescence (PL) (\n                    <jats:italic>\u03bb<\/jats:italic>\n                    <jats:sub>PL<\/jats:sub>\n                    : 397\u2005nm; FWHM: 48\u2005nm), moderate PL quantum yield (\n                    <jats:italic>\u03d5<\/jats:italic>\n                    <jats:sub>PL<\/jats:sub>\n                    : 72\u2009%, Tol), good triplet hot exciton (HE) conversion capability, and large horizontal dipole ratio (\u0398\n                    <jats:sub>\/\/<\/jats:sub>\n                    : 92\u2009%), the OLEDs based on CDFDB not only can emit UV electroluminescence with relatively good color purity (\n                    <jats:italic>\u03bb<\/jats:italic>\n                    <jats:sub>EL<\/jats:sub>\n                    : 398\u2005nm; CIE\n                    <jats:sub>x,y<\/jats:sub>\n                    : 0.161, 0.040), but also show a record maximum external quantum efficiency (EQE\n                    <jats:sub>max<\/jats:sub>\n                    ) of 12.0\u2009%. This study highlights the important role of horizontal dipole orientation engineering in the molecular design of HE UV\u2010OLED fluorophores.\n                  <\/jats:p>","DOI":"10.1002\/anie.202407502","type":"journal-article","created":{"date-parts":[[2024,5,9]],"date-time":"2024-05-09T06:28:02Z","timestamp":1715236082000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":41,"title":["Boosting External Quantum Efficiency to 12.0\u2009% of an Ultraviolet OLED by Engineering the Horizontal Dipole Orientation of a Hot Exciton Emitter"],"prefix":"10.1002","volume":"63","author":[{"given":"Kai","family":"Zhang","sequence":"first","affiliation":[{"name":"School of Materials Science and Engineering, Jiangsu Engineering Laboratory of Light-Electricity-Heat Energy-Converting Materials and Applications Changzhou University  Changzhou 213164 P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zhongxin","family":"Zhou","sequence":"additional","affiliation":[{"name":"School of Materials Science and Engineering, Jiangsu Engineering Laboratory of Light-Electricity-Heat Energy-Converting Materials and Applications Changzhou University  Changzhou 213164 P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Denghui","family":"Liu","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Luminescent Materials and Devices and Institute of Polymer Optoelectronic Materials and Devices South China University of Technology  Guangzhou 510640 P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yichao","family":"Chen","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Luminescent Materials and Devices and Institute of Polymer Optoelectronic Materials and Devices South China University of Technology  Guangzhou 510640 P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shiyue","family":"Zhang","sequence":"additional","affiliation":[{"name":"School of Materials Science and Engineering, Jiangsu Engineering Laboratory of Light-Electricity-Heat Energy-Converting Materials and Applications Changzhou University  Changzhou 213164 P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jie","family":"Pan","sequence":"additional","affiliation":[{"name":"School of Materials Science and Engineering, Jiangsu Engineering Laboratory of Light-Electricity-Heat Energy-Converting Materials and Applications Changzhou University  Changzhou 213164 P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xianfeng","family":"Qiao","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Luminescent Materials and Devices and Institute of Polymer Optoelectronic Materials and Devices South China University of Technology  Guangzhou 510640 P. R. 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China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4533-9118","authenticated-orcid":false,"given":"Yu","family":"Liu","sequence":"additional","affiliation":[{"name":"School of Materials Science and Engineering, Jiangsu Engineering Laboratory of Light-Electricity-Heat Energy-Converting Materials and Applications Changzhou University  Changzhou 213164 P. R. 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