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These complexes emit in the deep\u2010blue range at 424 and 466\u00a0nm with 100% quantum yields in all media. The deep\u2010blue thermally activates delayed fluorescence originates from a charge transfer state with an excited state lifetime as low as 213\u00a0ns, resulting in fast radiative rates of 4.7\u00a0\u00d7\u00a010\n                    <jats:sup>6\u00a0<\/jats:sup>\n                    s\n                    <jats:sup>\u22121<\/jats:sup>\n                    . The high thermal and photo\u2010stability of these carbene\u2013metal\u2013amide (CMA) materials enabled the authors to fabricate highly energy\u2010efficient organic light\u2010emitting diodes (OLED) in host\u2013guest architectures. Deep\u2010blue OLED devices with electroluminescence at 416 and 457\u00a0nm with practical external quantum efficiencies of up to 23% at 100\u00a0cd\u00a0m\n                    <jats:sup>\u22122<\/jats:sup>\n                    with excellent color coordinates CIE (\n                    <jats:italic>x<\/jats:italic>\n                    ;\n                    <jats:italic>y<\/jats:italic>\n                    )\u00a0=\u00a00.16; 0.07 and 0.17; 0.18 are reported. The operating stability of these OLEDs is the longest reported to date (LT\n                    <jats:sub>50<\/jats:sub>\n                    \u00a0=\u00a01\u00a0h) for deep\u2010blue CMA emitters, indicating a high promise for further development of blue OLED devices. These findings inform the molecular design strategy and correlation between delayed luminescence with high radiative rates and CMA OLED device operating stability.\n                  <\/jats:p>","DOI":"10.1002\/adma.202404357","type":"journal-article","created":{"date-parts":[[2024,5,10]],"date-time":"2024-05-10T10:49:48Z","timestamp":1715338188000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":40,"title":["Deep\u2010Blue and Fast Delayed Fluorescence from Carbene\u2013Metal\u2013Amides for Highly Efficient and Stable Organic Light\u2010Emitting Diodes"],"prefix":"10.1002","volume":"36","author":[{"given":"Alexander C.","family":"Brannan","sequence":"first","affiliation":[{"name":"Department of Chemistry The University of Manchester  Oxford Rd Manchester M13 9PL UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hwan\u2010Hee","family":"Cho","sequence":"additional","affiliation":[{"name":"Cavendish 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