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This work describes a simple gold(I) coordination strategy to enhance the spin\u2010orbit coupling of green and blue BN(O)\u2010based MR\u2010TADF emitters, which results in a notable increase in rate constants of the spectroscopically observed ISC process to 3\u00d710\n                    <jats:sup>9<\/jats:sup>\n                    \u2005s\n                    <jats:sup>\u22121<\/jats:sup>\n                    with nearly unitary ISC quantum yields. Accordingly, the resultant thermally\u2010stable Au\n                    <jats:sup>I<\/jats:sup>\n                    emitters attained large values of delayed fluorescence radiative rate constant up to 1.3\u00d710\n                    <jats:sup>5<\/jats:sup>\n                    \/1.7\u00d710\n                    <jats:sup>5<\/jats:sup>\n                    \u2005s\n                    <jats:sup>\u22121<\/jats:sup>\n                    in THF\/PMMA film while preserving narrowband emissions (FWHM=30\u201337\u2005nm) and high emission quantum yields (ca. 0.9). The vapor\u2010deposited ultrapure\u2010green OLEDs fabricated with these Au\n                    <jats:sup>I<\/jats:sup>\n                    emitters delivered high luminance of up to 2.53\u00d710\n                    <jats:sup>5<\/jats:sup>\n                    \u2005cd\u2009m\n                    <jats:sup>\u22122<\/jats:sup>\n                    as well as external quantum efficiencies of up to 30.3\u2009% with roll\u2010offs as low as 0.8\u2009% and long device lifetimes (LT\n                    <jats:sub>60<\/jats:sub>\n                    ) of 1210\u2005h at 1000\u2005cd\u2009m\n                    <jats:sup>\u22122<\/jats:sup>\n                    .\n                  <\/jats:p>","DOI":"10.1002\/anie.202213392","type":"journal-article","created":{"date-parts":[[2022,10,26]],"date-time":"2022-10-26T12:42:23Z","timestamp":1666788143000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":110,"title":["Gold(I) Multi\u2010Resonance Thermally Activated Delayed Fluorescent Emitters for Highly Efficient Ultrapure\u2010Green Organic Light\u2010Emitting Diodes"],"prefix":"10.1002","volume":"61","author":[{"given":"Siyuan","family":"Cai","sequence":"first","affiliation":[{"name":"Department of Chemistry State Key Laboratory of Synthetic Chemistry The University of Hong Kong  Pokfulam Road Hong Kong P. 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