Important role of ancillary ligand in the emission behaviours of blue-emitting heteroleptic Ir(III) complexes
DC Field | Value | Language |
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dc.contributor.author | Cho, Yang-Jin | - |
dc.contributor.author | Kim, So-Yoen | - |
dc.contributor.author | Kim, Jin-Hyoung | - |
dc.contributor.author | Crandell, Douglas W. | - |
dc.contributor.author | Baik, Mu-Hyun | - |
dc.contributor.author | Lee, Jiwon | - |
dc.contributor.author | Kim, Chul Hoon | - |
dc.contributor.author | Son, Ho-Jin | - |
dc.contributor.author | Han, Won-Sik | - |
dc.contributor.author | Kang, Sang Ook | - |
dc.date.accessioned | 2021-09-03T06:09:01Z | - |
dc.date.available | 2021-09-03T06:09:01Z | - |
dc.date.created | 2021-06-16 | - |
dc.date.issued | 2017-05-14 | - |
dc.identifier.issn | 2050-7526 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/83457 | - |
dc.description.abstract | A series of heteroleptic Ir(III) complexes composed of 2-(2,4-difluoro-3-(trifluoromethyl) phenyl)-4-methylpyridine (dfCF(3)) as the main ligand and such ancillary ligands as acetylacetonate [Ir(dfCF(3))(2)(acac)] (acac), picolinate [Ir(dfCF(3))(2)(pic)] (pic), and tetrakis-pyrazolyl borate [Ir(dfCF(3))(2)(bor)] (bor) were prepared, and their emission behaviors depending on the ancillary ligands were systematically investigated. It was found that the Huang-Rhys factors (S(M)s) of the emission decrease in the order bor (0.97) 4 acac (0.87) 4 pic (0.76), while the nonradiative rate constants (k(nr)/105 s(-1)) calculated from the quantum yields and lifetimes of emission were in the order acac (4.89) 4 pic (1.17) 4 bor (0.28). It was assumed that the large difference of k(nr) for the complexes arose from important contributions of the ancillary ligands to the crossing from an emissive state ((MLCT)-M-3) to a nonemissive metal-centered state ((MC)-M-3). The activation energies for the crossing from (MLCT)-M-3 to (MC)-M-3 were estimated from the temperature dependencies of the emission lifetime and were found to be 46 meV for acac, 61 meV for pic, and >100 meV for bor. The experimental results were in line with the theoretical calculations based on integrating quantum chemical modeling methods. By the excellent emission behavior, bor was applied as a dopant to prototype deep-blue phosphorescent organic light-emitting diode devices, which revealed high emission efficiency and colour purity. | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | ROYAL SOC CHEMISTRY | - |
dc.subject | EXCITED-STATE PROPERTIES | - |
dc.subject | ENERGY-GAP LAW | - |
dc.subject | PHOTOPHYSICAL PROPERTIES | - |
dc.subject | IRIDIUM COMPLEXES | - |
dc.subject | PLATINUM(II) COMPLEXES | - |
dc.subject | NONRADIATIVE DECAY | - |
dc.subject | EFFICIENCY | - |
dc.subject | PERFORMANCE | - |
dc.subject | SERIES | - |
dc.subject | PHOTOCHEMISTRY | - |
dc.title | Important role of ancillary ligand in the emission behaviours of blue-emitting heteroleptic Ir(III) complexes | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Kim, Chul Hoon | - |
dc.contributor.affiliatedAuthor | Son, Ho-Jin | - |
dc.contributor.affiliatedAuthor | Kang, Sang Ook | - |
dc.identifier.doi | 10.1039/c7tc00844a | - |
dc.identifier.scopusid | 2-s2.0-85021689223 | - |
dc.identifier.wosid | 000401103000017 | - |
dc.identifier.bibliographicCitation | JOURNAL OF MATERIALS CHEMISTRY C, v.5, no.18, pp.4480 - 4487 | - |
dc.relation.isPartOf | JOURNAL OF MATERIALS CHEMISTRY C | - |
dc.citation.title | JOURNAL OF MATERIALS CHEMISTRY C | - |
dc.citation.volume | 5 | - |
dc.citation.number | 18 | - |
dc.citation.startPage | 4480 | - |
dc.citation.endPage | 4487 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Materials Science | - |
dc.relation.journalResearchArea | Physics | - |
dc.relation.journalWebOfScienceCategory | Materials Science, Multidisciplinary | - |
dc.relation.journalWebOfScienceCategory | Physics, Applied | - |
dc.subject.keywordPlus | EXCITED-STATE PROPERTIES | - |
dc.subject.keywordPlus | ENERGY-GAP LAW | - |
dc.subject.keywordPlus | PHOTOPHYSICAL PROPERTIES | - |
dc.subject.keywordPlus | IRIDIUM COMPLEXES | - |
dc.subject.keywordPlus | PLATINUM(II) COMPLEXES | - |
dc.subject.keywordPlus | NONRADIATIVE DECAY | - |
dc.subject.keywordPlus | EFFICIENCY | - |
dc.subject.keywordPlus | PERFORMANCE | - |
dc.subject.keywordPlus | SERIES | - |
dc.subject.keywordPlus | PHOTOCHEMISTRY | - |
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