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CMA complexes emit in the sky\u2010blue range at 501 and 511\u00a0nm with unity quantum yields in amorphous solid state media. Both CMA complexes emit thermally activated delayed fluorescence (TADF) originating from a charge transfer (CT) state with an excited state lifetime as short as 473\u00a0ns, resulting in fast radiative rates of 2\u00a0\u00d7\u00a010\n                    <jats:sup>6<\/jats:sup>\n                    \u00a0 s\n                    <jats:sup>\u22121<\/jats:sup>\n                    . The impact on the photoluminescence properties of the electron\u2010donating oxygen and sulfur atoms in amide\u2010donor ligand has been interpreted with the help of steady\u2010state and transient photo and electroluminescence experiments. Theoretical investigations revealed two charge\u2010transfer (T\n                    <jats:sub>1<\/jats:sub>\n                    and T\n                    <jats:sub>2<\/jats:sub>\n                    ) states followed by a locally excited T\n                    <jats:sub>3<\/jats:sub>\n                    triplet state, and their spin\u2013orbit coupling analysis. Sky\u2010blue host\u2010guest and host\u2010free organic light\u2010emitting diode (OLED) devices are fabricated with electroluminescence at \u2248490 nm and practical external quantum efficiencies up to 23% with colour coordinates CIE (x; y) = 0.19; 0.32. The superior performance and operating stability of the neat OLEDs are correlated with the presence of the heavier sulfur atom, suggesting further molecular design modifications toward stable CMA OLED devices with a simplified architecture of the emitting layer (host\u2010free OLED).\n                  <\/jats:p>","DOI":"10.1002\/advs.202516582","type":"journal-article","created":{"date-parts":[[2025,11,14]],"date-time":"2025-11-14T13:52:36Z","timestamp":1763128356000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Carbene\u2013Metal\u2013Amide Materials Design: Tailoring\n                    <i>\u03c0<\/i>\n                    \u2010Extended Amides for High\u2010Performance Organic Light\u2010Emitting Diodes"],"prefix":"10.1002","volume":"13","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9640-2594","authenticated-orcid":false,"given":"Alexander C.","family":"Brannan","sequence":"first","affiliation":[{"name":"Department of Chemistry The University of Manchester  Oxford Rd. Manchester M13 9PL United Kingdom"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jeoungmin","family":"Ji","sequence":"additional","affiliation":[{"name":"School of Electrical Engineering Korea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Nguyen Le","family":"Phuoc","sequence":"additional","affiliation":[{"name":"Department of Chemistry and Sustainable Technology University of Eastern Finland  Joensuu Campus Joensuu FI\u201080101 Finland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Donggyun","family":"Lee","sequence":"additional","affiliation":[{"name":"School of Electrical Engineering Korea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Junho","family":"Kim","sequence":"additional","affiliation":[{"name":"School of Electrical Engineering Korea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mikko","family":"Linnolahti","sequence":"additional","affiliation":[{"name":"Department of Chemistry and Sustainable Technology University of Eastern Finland  Joensuu Campus Joensuu FI\u201080101 Finland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Seunghyup","family":"Yoo","sequence":"additional","affiliation":[{"name":"School of Electrical Engineering Korea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Republic of Korea"},{"name":"Graduate School of Semiconductor Technology Korea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2617-6402","authenticated-orcid":false,"given":"Alexander S.","family":"Romanov","sequence":"additional","affiliation":[{"name":"Department of Chemistry The University of Manchester  Oxford Rd. Manchester M13 9PL United Kingdom"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2025,11,14]]},"reference":[{"key":"e_1_2_8_1_1","doi-asserted-by":"publisher","DOI":"10.1002\/adma.202005630"},{"key":"e_1_2_8_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ccr.2022.214975"},{"key":"e_1_2_8_3_1","doi-asserted-by":"publisher","DOI":"10.1039\/C3CS60466G"},{"key":"e_1_2_8_4_1","doi-asserted-by":"publisher","DOI":"10.1021\/ja043092r"},{"key":"e_1_2_8_5_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ccr.2017.09.011"},{"key":"e_1_2_8_6_1","doi-asserted-by":"publisher","DOI":"10.1126\/science.aah4345"},{"key":"e_1_2_8_7_1","doi-asserted-by":"publisher","DOI":"10.1002\/adom.201801347"},{"key":"e_1_2_8_8_1","doi-asserted-by":"publisher","DOI":"10.1038\/s41467-020-15369-8"},{"key":"e_1_2_8_9_1","doi-asserted-by":"publisher","DOI":"10.1021\/acs.chemmater.0c01769"},{"key":"e_1_2_8_10_1","doi-asserted-by":"publisher","DOI":"10.1126\/science.aav2865"},{"key":"e_1_2_8_11_1","doi-asserted-by":"publisher","DOI":"10.1021\/jacs.9b13755"},{"key":"e_1_2_8_12_1","doi-asserted-by":"publisher","DOI":"10.1021\/jacs.2c06948"},{"key":"e_1_2_8_13_1","doi-asserted-by":"publisher","DOI":"10.1002\/adma.202404357"},{"key":"e_1_2_8_14_1","doi-asserted-by":"publisher","DOI":"10.1002\/adma.202306249"},{"key":"e_1_2_8_15_1","doi-asserted-by":"publisher","DOI":"10.1039\/D2TC02288E"},{"key":"e_1_2_8_16_1","doi-asserted-by":"publisher","DOI":"10.1021\/acs.chemrev.7b00617"},{"key":"e_1_2_8_17_1","doi-asserted-by":"publisher","DOI":"10.1021\/acs.chemrev.5c00021"},{"key":"e_1_2_8_18_1","doi-asserted-by":"publisher","DOI":"10.1038\/s42004-021-00533-y"},{"key":"e_1_2_8_19_1","doi-asserted-by":"publisher","DOI":"10.1063\/1.1733610"},{"key":"e_1_2_8_20_1","doi-asserted-by":"publisher","DOI":"10.1002\/anie.202402052"},{"key":"e_1_2_8_21_1","doi-asserted-by":"publisher","DOI":"10.1002\/adom.202200312"},{"key":"e_1_2_8_22_1","doi-asserted-by":"publisher","DOI":"10.1021\/acs.chemmater.8b05112"},{"key":"e_1_2_8_23_1","doi-asserted-by":"publisher","DOI":"10.1021\/acs.chemmater.2c01938"},{"key":"e_1_2_8_24_1","doi-asserted-by":"publisher","DOI":"10.1039\/D3QM00653K"},{"key":"e_1_2_8_25_1","doi-asserted-by":"publisher","DOI":"10.1002\/adfm.202112881"},{"key":"e_1_2_8_26_1","doi-asserted-by":"publisher","DOI":"10.1002\/pssa.201228320"},{"key":"e_1_2_8_27_1","doi-asserted-by":"publisher","DOI":"10.1039\/D1MA00141H"},{"key":"e_1_2_8_28_1","doi-asserted-by":"publisher","DOI":"10.1002\/anie.201602239"},{"key":"e_1_2_8_29_1","doi-asserted-by":"publisher","DOI":"10.1039\/C5SC04902D"},{"key":"e_1_2_8_30_1","doi-asserted-by":"publisher","DOI":"10.1021\/acsomega.9b03979"},{"key":"e_1_2_8_31_1","doi-asserted-by":"publisher","DOI":"10.1021\/acs.jpcc.0c06528"},{"key":"e_1_2_8_32_1","doi-asserted-by":"publisher","DOI":"10.1063\/1.3273407"},{"key":"e_1_2_8_33_1","doi-asserted-by":"publisher","DOI":"10.1002\/adma.201908175"},{"key":"e_1_2_8_34_1","doi-asserted-by":"publisher","DOI":"10.1002\/adma.202100161"},{"key":"e_1_2_8_35_1","doi-asserted-by":"publisher","DOI":"10.1021\/jp412614k"},{"key":"e_1_2_8_36_1","doi-asserted-by":"publisher","DOI":"10.1002\/adom.202000102"}],"container-title":["Advanced Science"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/advanced.onlinelibrary.wiley.com\/doi\/pdf\/10.1002\/advs.202516582","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/advanced.onlinelibrary.wiley.com\/doi\/full-xml\/10.1002\/advs.202516582","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/advanced.onlinelibrary.wiley.com\/doi\/pdf\/10.1002\/advs.202516582","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,4,12]],"date-time":"2026-04-12T07:48:44Z","timestamp":1775980124000},"score":1,"resource":{"primary":{"URL":"https:\/\/advanced.onlinelibrary.wiley.com\/doi\/10.1002\/advs.202516582"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2025,11,14]]},"references-count":36,"journal-issue":{"issue":"6","published-print":{"date-parts":[[2026,1]]}},"alternative-id":["10.1002\/advs.202516582"],"URL":"https:\/\/doi.org\/10.1002\/advs.202516582","archive":["Portico"],"relation":{},"ISSN":["2198-3844","2198-3844"],"issn-type":[{"value":"2198-3844","type":"print"},{"value":"2198-3844","type":"electronic"}],"subject":[],"published":{"date-parts":[[2025,11,14]]},"assertion":[{"value":"2025-08-26","order":0,"name":"received","label":"Received","group":{"name":"publication_history","label":"Publication History"}},{"value":"2025-11-14","order":3,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}],"article-number":"e16582"}}