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In fact, no deep\u2010blue triplet emitter with color purity and high device performance has previously been reported. In this study, a deep\u2010blue triplet emitter, <jats:italic>mer<\/jats:italic>\u2010tris(<jats:italic>N<\/jats:italic>\u2010phenyl, <jats:italic>N<\/jats:italic>\u2010benzyl\u2010pyridoimidazol\u20102\u2010yl)iridium(III) (<jats:italic>mer<\/jats:italic>\u2010Ir1) is developed, which meets the requirements of the National Television System Committee (NTSC) CIE(<jats:italic>x<\/jats:italic>, <jats:italic>y<\/jats:italic>) coordinates of (0.149, 0.085) with an extremely high EQE of 24.8% and maximum brightness (<jats:italic>L<\/jats:italic><jats:sub>max<\/jats:sub>) of 6453 cd m<jats:sup>\u22122<\/jats:sup>, by a device with a 40 vol% doping ratio. Moreover, another device demonstrates an EQE<jats:sub>max<\/jats:sub> of 21.3%, an <jats:italic>L<\/jats:italic><jats:sub>max<\/jats:sub> of 5247 cd m<jats:sup>\u22122<\/jats:sup>, and CIE(<jats:italic>x<\/jats:italic>, <jats:italic>y<\/jats:italic>) coordinates of (0.151, 0.086) at a 30 vol% doping ratio. This is the first report of a high\u2010performance, deep\u2010blue phosphor, carbene\u2010based Ir(III) complex device with outstanding CIE(<jats:italic>x<\/jats:italic>, <jats:italic>y<\/jats:italic>) color coordinates and a high EQE. The results of this study indicate that the novel dopant <jats:italic>mer<\/jats:italic>\u2010Ir1 is a promising candidate for reducing power consumption in display applications.<\/jats:p>","DOI":"10.1002\/adma.202002120","type":"journal-article","created":{"date-parts":[[2020,6,10]],"date-time":"2020-06-10T02:09:07Z","timestamp":1591754947000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":109,"title":["External Quantum Efficiency Exceeding 24% with CIE<i><sub>y<\/sub><\/i> Value of 0.08 using a Novel Carbene\u2010Based Iridium Complex in Deep\u2010Blue Phosphorescent Organic Light\u2010Emitting Diodes"],"prefix":"10.1002","volume":"32","author":[{"given":"Ho\u2010Yeol","family":"Park","sequence":"first","affiliation":[{"name":"Department of Chemistry Education Graduate Department of Chemical Materials Sustainable Utilization of Photovoltaic Energy Research Center Institute for Plastic Information and Energy Materials Pusan National University  Busan 46241 Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Athithan","family":"Maheshwaran","sequence":"additional","affiliation":[{"name":"Department of Chemistry Education Graduate Department of Chemical Materials Sustainable Utilization of Photovoltaic Energy Research Center Institute for Plastic Information and Energy Materials Pusan National University  Busan 46241 Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chang\u2010Ki","family":"Moon","sequence":"additional","affiliation":[{"name":"Department of Materials Science and Engineering Seoul National University  Seoul 151\u2013744 Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hyuna","family":"Lee","sequence":"additional","affiliation":[{"name":"Organic Optoelectronic Device Laboratory (OODL) Department of Information Display Kyung Hee University  Seoul 02447 Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Saripally Sudhaker","family":"Reddy","sequence":"additional","affiliation":[{"name":"Department of Chemistry Education Graduate Department of Chemical Materials Sustainable Utilization of Photovoltaic Energy Research Center Institute for Plastic Information and Energy Materials Pusan National University  Busan 46241 Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Vijaya Gopalan","family":"Sree","sequence":"additional","affiliation":[{"name":"Department of Chemistry Education Graduate Department of Chemical Materials Sustainable Utilization of Photovoltaic Energy Research Center Institute for Plastic Information and Energy Materials Pusan National University  Busan 46241 Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jiyoung","family":"Yoon","sequence":"additional","affiliation":[{"name":"Division of Industrial Metrology Korea Research Institute of Standards and Science (KRISS)  Daejeon 34113 Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jeong Won","family":"Kim","sequence":"additional","affiliation":[{"name":"Division of Industrial Metrology Korea Research Institute of Standards and Science (KRISS)  Daejeon 34113 Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jang Hyuk","family":"Kwon","sequence":"additional","affiliation":[{"name":"Organic Optoelectronic Device Laboratory (OODL) Department of Information Display Kyung Hee University  Seoul 02447 Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jang\u2010Joo","family":"Kim","sequence":"additional","affiliation":[{"name":"Department of Materials Science and Engineering Seoul National University  Seoul 151\u2013744 Republic of 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