DC Field | Value | Language |
---|---|---|
dc.contributor.author | Lee, Young Hoon | ko |
dc.contributor.author | Park, Sunghee | ko |
dc.contributor.author | Oh, Jihun | ko |
dc.contributor.author | Woo, Seung-Je | ko |
dc.contributor.author | Kumar, Ajay | ko |
dc.contributor.author | Kim, Jang-Joo | ko |
dc.contributor.author | Jung, Jaehoon | ko |
dc.contributor.author | Yoo, Seunghyup | ko |
dc.contributor.author | Lee, Min Hyung | ko |
dc.date.accessioned | 2018-10-19T00:30:35Z | - |
dc.date.available | 2018-10-19T00:30:35Z | - |
dc.date.created | 2018-09-19 | - |
dc.date.created | 2018-09-19 | - |
dc.date.created | 2018-09-19 | - |
dc.date.issued | 2018-09 | - |
dc.identifier.citation | ADVANCED OPTICAL MATERIALS, v.6, no.17 | - |
dc.identifier.issn | 2195-1071 | - |
dc.identifier.uri | http://hdl.handle.net/10203/245900 | - |
dc.description.abstract | A novel approach to highly efficient, blue thermally activated delayed fluorescent (TADF) emitters is proposed. A series of ortho-carbazole-appended triarylboron compounds (1-5) are prepared with various substituents, including tert-Bu, Me, and OMe, introduced to the carbazole donor and/or to the dimesitylphenylboron (PhBMes(2)) acceptor. Depending on the substituents on the donor and/or acceptor moieties, the emission color is finely tuned over the entire blue region from sky blue to ultradeep blue. Retention of a twisted donor (D)-acceptor (A) structure enabled by the ortho D-A connectivity and bulky triarylboron leads to small energy splitting (Delta E-ST) between singlet and triplet excited states, resulting in very efficient TADF. High-efficiency blue TADF organic light-emitting diodes (OLEDs) are realized by using the proposed ortho D-A compounds as emitters. Among them, the blue OLEDs incorporating a BuCzMeoB (2) emitter exhibit a very high external quantum efficiency (EQE) of 32.8% at Commission Internationale de l'Eclairage (CIE) color coordinates of (0.135, 0.266). The high device efficiency is attributed to both the high photoluminescence quantum yield of 2 in a given host film (93%) and the high horizontal transition dipole ratio (Theta) of 0.76. Ultradeep blue OLEDs with a record-high efficiency are also fabricated with a CzOMeoB (5) emitter, exhibiting an EQE of 14.9% at CIE coordinates of (0.151, 0.058). | - |
dc.language | English | - |
dc.publisher | WILEY-V C H VERLAG GMBH | - |
dc.title | High-Efficiency Sky Blue to Ultradeep Blue Thermally Activated Delayed Fluorescent Diodes Based on Ortho-Carbazole-Appended Triarylboron Emitters: Above 32% External Quantum Efficiency in Blue Devices | - |
dc.type | Article | - |
dc.identifier.wosid | 000443548600015 | - |
dc.identifier.scopusid | 2-s2.0-85052725537 | - |
dc.type.rims | ART | - |
dc.citation.volume | 6 | - |
dc.citation.issue | 17 | - |
dc.citation.publicationname | ADVANCED OPTICAL MATERIALS | - |
dc.identifier.doi | 10.1002/adom.201800385 | - |
dc.contributor.localauthor | Yoo, Seunghyup | - |
dc.contributor.nonIdAuthor | Lee, Young Hoon | - |
dc.contributor.nonIdAuthor | Oh, Jihun | - |
dc.contributor.nonIdAuthor | Woo, Seung-Je | - |
dc.contributor.nonIdAuthor | Kumar, Ajay | - |
dc.contributor.nonIdAuthor | Kim, Jang-Joo | - |
dc.contributor.nonIdAuthor | Jung, Jaehoon | - |
dc.contributor.nonIdAuthor | Lee, Min Hyung | - |
dc.description.isOpenAccess | N | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordAuthor | blue devices | - |
dc.subject.keywordAuthor | OLEDs | - |
dc.subject.keywordAuthor | ortho donor-acceptor compounds | - |
dc.subject.keywordAuthor | TADF emitters | - |
dc.subject.keywordAuthor | thermally activated delayed fluorescence | - |
dc.subject.keywordAuthor | triarylboron | - |
dc.subject.keywordPlus | LIGHT-EMITTING-DIODES | - |
dc.subject.keywordPlus | MOLECULAR DESIGN | - |
dc.subject.keywordPlus | PURE BLUE | - |
dc.subject.keywordPlus | PHOSPHINE-OXIDE | - |
dc.subject.keywordPlus | ROLL-OFF | - |
dc.subject.keywordPlus | ELECTROLUMINESCENCE | - |
dc.subject.keywordPlus | EMISSION | - |
dc.subject.keywordPlus | STRATEGY | - |
dc.subject.keywordPlus | OLEDS | - |
dc.subject.keywordPlus | PERFORMANCE | - |
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