DC Field | Value | Language |
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dc.contributor.author | SOHN, SUN YOUNG | - |
dc.contributor.author | HA, MIN WOO | - |
dc.contributor.author | PARK, JIYOUNG | - |
dc.contributor.author | KIM, YOO-HEON | - |
dc.contributor.author | AHN, HYUNGJU | - |
dc.contributor.author | JUNG, SUNGJUNE | - |
dc.contributor.author | KWON, SOON-KI | - |
dc.contributor.author | KIM, YUN-HI | - |
dc.date.accessioned | 2020-07-17T01:50:50Z | - |
dc.date.available | 2020-07-17T01:50:50Z | - |
dc.date.created | 2020-05-26 | - |
dc.date.issued | 2020-05 | - |
dc.identifier.issn | 2296-2646 | - |
dc.identifier.uri | https://oasis.postech.ac.kr/handle/2014.oak/103885 | - |
dc.description.abstract | Organic light-emitting diodes with thermally activated delayed fluorescence emitter have been developed with highly twisted donor-acceptor configurations and color-pure blue emitters. Synthesized 4-(4-(4,6-diphenylpyrimidin-2-yl)phenyl)-10H-spiro[acridine-9,9 '-fluorene] (4,6-PhPMAF) doped device with spiroacridine as a donor unit and diphenylpyrimidine as acceptor exhibits the device characteristics such as the luminescence, external quantum efficiencies, current efficiencies, and power efficiencies corresponding to 213 cd/m(2), 2.95%, 3.27 cd/A, and 2.94 lm/W with Commission International de l'Eclairage (CIE) coordinates of (0.15, 0.11) in 4,6-PhPMAF-doped DPEPO emitter. The reported 10-(4-(2,6-diphenylpyrimidin-4-yl)phenyl)-10H-spiro[acridine-9,9 '-fluorene] (2,6-PhPMAF) doped device exhibit high device performance with 1,445 cd/m(2), 12.38%, 19.6 cd/A, and 15.4 lm/W, which might be originated from increased internal quantum efficiency by up-converted triplet excitons to the singlet state with relatively smaller Delta E-ST of 0.17 eV and higher reverse intersystem crossing rate (k(RISC)) of 1.0 x10(8)/s in 2,6-PhPMAF than 0.27 eV and 3.9 x10(7)/s in 4,6-PhPMAF. Despite low performance of 4,6-PhPMAF doped device, synthesized 4,6-PhPMAF has better color purity as a deep-blue emission with y axis (0.11) than reported 2,6-PhPMAF with y axis (0.19) in CIE coordinate. The synthesized 4,6-PhPMAF has higher thermal stability of any transition up to 300 degrees C and decomposition temperature with only 5% weight loss in 400 degrees C than reported 2,6-PhPMAF. The maximum photoluminescence emission of 4,6-PhPMAF in various solvents appeared at 438 nm, which has blue shift about 20 nm than that of 2,6-PhPMAF, which contributes deep-blue emission in synthesized 4,6-PhPMAF. | - |
dc.language | English | - |
dc.publisher | FRONTIERS MEDIA SA | - |
dc.relation.isPartOf | FRONTIERS IN CHEMISTRY | - |
dc.title | High-Efficiency Diphenylpyrimidine Derivatives Blue Thermally Activated Delayed Fluorescence Organic Light-Emitting Diodes | - |
dc.type | Article | - |
dc.identifier.doi | 10.3389/fchem.2020.00356 | - |
dc.type.rims | ART | - |
dc.identifier.bibliographicCitation | FRONTIERS IN CHEMISTRY, v.8, pp.356-1 - 356-9 | - |
dc.identifier.wosid | 000537845300001 | - |
dc.citation.endPage | 356-9 | - |
dc.citation.startPage | 356-1 | - |
dc.citation.title | FRONTIERS IN CHEMISTRY | - |
dc.citation.volume | 8 | - |
dc.contributor.affiliatedAuthor | SOHN, SUN YOUNG | - |
dc.contributor.affiliatedAuthor | AHN, HYUNGJU | - |
dc.contributor.affiliatedAuthor | JUNG, SUNGJUNE | - |
dc.identifier.scopusid | 2-s2.0-85085523599 | - |
dc.description.journalClass | 1 | - |
dc.description.journalClass | 1 | - |
dc.description.isOpenAccess | Y | - |
dc.type.docType | Article | - |
dc.subject.keywordAuthor | organic light-emitting diode | - |
dc.subject.keywordAuthor | thermally activated delayed fluorescence | - |
dc.subject.keywordAuthor | blue emitter | - |
dc.subject.keywordAuthor | diphenylpyrimidine | - |
dc.subject.keywordAuthor | singlet-triplet energy gap | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Multidisciplinary | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Chemistry | - |
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