Stable Blue Phosphorescence Iridium(III) Cyclometalated Complexes Prompted by Intramolecular Hydrogen Bond in Ancillary Ligand
DC Field | Value | Language |
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dc.contributor.author | Yi, Seungjun | - |
dc.contributor.author | Kim, Jin-Hyoung | - |
dc.contributor.author | Cho, Yang-Jin | - |
dc.contributor.author | Lee, Jiwon | - |
dc.contributor.author | Choi, Tae-Sup | - |
dc.contributor.author | Cho, Dae Won | - |
dc.contributor.author | Pac, Chyongjin | - |
dc.contributor.author | Han, Won-Sik | - |
dc.contributor.author | Son, Ho-Jin | - |
dc.contributor.author | Kang, Sang Ook | - |
dc.date.accessioned | 2021-09-04T00:47:41Z | - |
dc.date.available | 2021-09-04T00:47:41Z | - |
dc.date.created | 2021-06-17 | - |
dc.date.issued | 2016-04-04 | - |
dc.identifier.issn | 0020-1669 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/88939 | - |
dc.description.abstract | Improvement of the stability of blue phosphorescent dopant material is one of the key factors for real application of organic light-emitting diodes (OLEDs). In this study, we found that the intramolecular hydrogen bonding in an ancillary ligand from a heteroleptic Ir(III) complex can play an important role in the stability of blue phosphorescence. To rationalize the role of intramolecular hydrogen bonding, a series of Ir(III) complexes is designed and prepared: Ir(dfppy)(2)(pic-OH) (1a), Ir(dfppy)(2)-(pic-OMe) (1b), Ir(ppy)(2)(pic-OH) (2a), and Ir(ppy)(2)(pic-OMe) (2b). The emission lifetime of Ir(dfppy)(2)(pic-OH) (1a) (tau(em) = 3.19 mu s) in dichloromethane solution was found to be significantly longer than that of Ir(dfppy)(2)(pic-OMe) (1b) (tau(em) = 0.94 mu s), because of a substantial difference in the nonradiative decay rate (k(nr) = 0.28 x 10(5) s(-1) for (1a) vs 2.99 X 10(5) s(-1) for (1b)). These results were attributed to the intramolecular OH center dot center dot center dot O=C hydrogen bond of the 3-hydroxy-picolinato ligand. Finally, device lifetime was significantly improved when 1a was used as the dopant compared to FIrpic, a well-known blue dopant. Device III (1a as dopant) achieved an operational lifetime of 34.3 h for an initial luminance of 400 nits compared to that of device IV (FIrpic as dopant), a value of 20.1 h, indicating that the intramolecular hydrogen bond in ancillary ligand is playing an important role in device stability. | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | AMER CHEMICAL SOC | - |
dc.subject | SET MODEL CHEMISTRY | - |
dc.subject | IR(III) COMPLEXES | - |
dc.subject | PHOTOPHYSICAL PROPERTIES | - |
dc.subject | METAL-COMPLEXES | - |
dc.subject | EXCITED-STATES | - |
dc.subject | TOTAL ENERGIES | - |
dc.subject | TRIPLET-STATE | - |
dc.subject | RUTHENIUM(II) | - |
dc.subject | TEMPERATURE | - |
dc.subject | EFFICIENCY | - |
dc.title | Stable Blue Phosphorescence Iridium(III) Cyclometalated Complexes Prompted by Intramolecular Hydrogen Bond in Ancillary Ligand | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Yi, Seungjun | - |
dc.contributor.affiliatedAuthor | Cho, Dae Won | - |
dc.contributor.affiliatedAuthor | Son, Ho-Jin | - |
dc.contributor.affiliatedAuthor | Kang, Sang Ook | - |
dc.identifier.doi | 10.1021/acs.inorgchem.5b02511 | - |
dc.identifier.scopusid | 2-s2.0-84963935972 | - |
dc.identifier.wosid | 000373550700018 | - |
dc.identifier.bibliographicCitation | INORGANIC CHEMISTRY, v.55, no.7, pp.3324 - 3331 | - |
dc.relation.isPartOf | INORGANIC CHEMISTRY | - |
dc.citation.title | INORGANIC CHEMISTRY | - |
dc.citation.volume | 55 | - |
dc.citation.number | 7 | - |
dc.citation.startPage | 3324 | - |
dc.citation.endPage | 3331 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Chemistry | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Inorganic & Nuclear | - |
dc.subject.keywordPlus | SET MODEL CHEMISTRY | - |
dc.subject.keywordPlus | IR(III) COMPLEXES | - |
dc.subject.keywordPlus | PHOTOPHYSICAL PROPERTIES | - |
dc.subject.keywordPlus | METAL-COMPLEXES | - |
dc.subject.keywordPlus | EXCITED-STATES | - |
dc.subject.keywordPlus | TOTAL ENERGIES | - |
dc.subject.keywordPlus | TRIPLET-STATE | - |
dc.subject.keywordPlus | RUTHENIUM(II) | - |
dc.subject.keywordPlus | TEMPERATURE | - |
dc.subject.keywordPlus | EFFICIENCY | - |
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