DC Field | Value | Language |
---|---|---|
dc.contributor.author | SOHN, SUN YOUNG | - |
dc.contributor.author | PARK, KWANG HUN | - |
dc.contributor.author | KWON, SOON-KI | - |
dc.contributor.author | LEE, HAN KOO | - |
dc.contributor.author | AHN, HYUNGJU | - |
dc.contributor.author | JUNG, SUNGJUNE | - |
dc.contributor.author | KIM, YUN-HI | - |
dc.date.accessioned | 2018-10-22T07:56:24Z | - |
dc.date.available | 2018-10-22T07:56:24Z | - |
dc.date.created | 2018-10-10 | - |
dc.date.issued | 2018-08 | - |
dc.identifier.issn | 2470-1343 | - |
dc.identifier.uri | https://oasis.postech.ac.kr/handle/2014.oak/93986 | - |
dc.description.abstract | Vacuum-processed diphenylbis(3-(pyridine-2-yl)phenyl)silane (2PTPS), diphenylbis(3-(pyridine-3-yl)phenyl)silane (3PTPS), and diphenylbis(3-(pyridine-4-yl)phenyl)silane (4PTPS) have been used as electron-transporting host materials combined with tris(4-carbazoyl-9-ylphenyl)amine (TCTA) as the hole-transporting host, which induce balanced charge carrier transport for high-efficiency phosphorescent organic light-emitting diodes. The 4PTPS-based organic light-emitting diodes with tris[2-phenylpyridinato-C-2,N]iridium(III) [Ir(ppy)(3)] dopant showed highest current efficiency and external quantum efficiency of 53.54 cd/A and 15.61%, compared to 2PTPS (40.75 cd/A, 11.84%) and 3PTPS (29.35 cd/A, 8.54%). These results were attributed to the well-aligned structure with preferential horizontal orientation of the emitting material layer by the diffraction intensity distribution as a function of azimuthal angle in two-dimensional grazing incidence X-ray diffraction analysis. The molecular orientation of TCTA:4PTPS material with a narrow azimuthal intensity distribution had better priority to the horizontal direction than the other TCTA:2PTPS and TCTA:3PTPS materials, which is related to the charge transport as well as the device efficiency. We found that the preferential horizontal orientation of the co-host material with a balanced charge carrier was not affected by Ir(ppy)(3) dopant with a homoleptic structure and bis-[2-(4,6-difluorophenyl)pyridinato-N,C-2](picolinato)iridium [Firpic] dopant with a heteroleptic structure in the co-host/dopant system. | - |
dc.language | English | - |
dc.publisher | AMER CHEMICAL SOC | - |
dc.relation.isPartOf | ACS OMEGA | - |
dc.title | Preferential Orientation of Tetrahedral Silicon-Based Hosts in Phosphorescent Organic Light-Emitting Diodes | - |
dc.type | Article | - |
dc.identifier.doi | 10.1021/acsomega.8b01358 | - |
dc.type.rims | ART | - |
dc.identifier.bibliographicCitation | ACS OMEGA, v.3, no.8, pp.9989 - 9996 | - |
dc.identifier.wosid | 000444182900143 | - |
dc.citation.endPage | 9996 | - |
dc.citation.number | 8 | - |
dc.citation.startPage | 9989 | - |
dc.citation.title | ACS OMEGA | - |
dc.citation.volume | 3 | - |
dc.contributor.affiliatedAuthor | SOHN, SUN YOUNG | - |
dc.contributor.affiliatedAuthor | LEE, HAN KOO | - |
dc.contributor.affiliatedAuthor | AHN, HYUNGJU | - |
dc.contributor.affiliatedAuthor | JUNG, SUNGJUNE | - |
dc.identifier.scopusid | 2-s2.0-85052677035 | - |
dc.description.journalClass | 1 | - |
dc.description.journalClass | 1 | - |
dc.description.isOpenAccess | N | - |
dc.type.docType | Article | - |
dc.subject.keywordPlus | EXTERNAL QUANTUM EFFICIENCY | - |
dc.subject.keywordPlus | IRIDIUM COMPLEXES | - |
dc.subject.keywordPlus | DEPOSITION | - |
dc.subject.keywordPlus | MOLECULES | - |
dc.subject.keywordPlus | COHOST | - |
dc.subject.keywordPlus | FILMS | - |
dc.subject.keywordPlus | OLEDS | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Multidisciplinary | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Chemistry | - |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.
library@postech.ac.kr Tel: 054-279-2548
Copyrights © by 2017 Pohang University of Science ad Technology All right reserved.