Synthesis and Characterization of Blue Phosphorescent NHC-Ir(III) Complexes with Annulated Heterocyclic 1,2,4-Triazolophenanthridine Derivatives for Highly Efficient PhOLEDs
DC Field | Value | Language |
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dc.contributor.author | Yun, Bo-Sun | - |
dc.contributor.author | Kim, So-Yoen | - |
dc.contributor.author | Kim, Jin-Hyoung | - |
dc.contributor.author | Choi, Sunghan | - |
dc.contributor.author | Lee, Sanghun | - |
dc.contributor.author | Son, Ho-Jin | - |
dc.contributor.author | Kang, Sang Ook | - |
dc.date.accessioned | 2022-08-10T22:40:56Z | - |
dc.date.available | 2022-08-10T22:40:56Z | - |
dc.date.created | 2022-08-10 | - |
dc.date.issued | 2022-06-28 | - |
dc.identifier.issn | 2637-6113 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/142788 | - |
dc.description.abstract | Efficient tris-bidentate Ir(III) phosphorescent dopants were prepared using a series of 1,2,4-triazolo[4,3-f]phenanthridine (tzp) moieties modified with aryl substituents (phenyl, tolyl, and xylenyl) as the main phenylimidazole-based N-heterocyclic carbene (NHC) chelates (C<^>C:). According to the degree of the bulkiness of the aryl substituent and the ligation mode, the five prepared Ir(C-tzp<^>C:) complexes include four homoleptic NHC-Ir(III) complexes, fac-Ir(tzpPh)(3), fac-/mer-Ir(tzpTol)(3), and mer-Ir(tzpXyl)(3), and one heteroleptic NHC-Ir(III) complex, cis-Ir(tzpPh)(2)(tzpPh)', in which the phenyl moiety of one tzpPh ligand is abnormally ligated to the Ir metal center, unlike other tzp ligands. The Ir(III) complexes ligated by carbene ligands (C-tzp<^>C:) exhibited highly efficient emissions in the solid state (Phi(em) = 23.2-54.0%). Electrochemical and theoretical studies revealed that the excited-state properties of these NHC-Ir(III) complexes are variable on the extent of planarity and pi-conjugation of the C-tzp<^>C: chelating ligand. Due to its enhanced rigidity and low excited-state energy, a result of abnormal tzpPh ligand ligation, the heteroleptic cis-Ir(tzpPh)(2)(tzpPh)' exhibited the most efficient emission properties in solution (Phi(em) = 21.4%) and solid (Phi(em) = 54.0%) media. Of the devices fabricated with Ir(C-tzp<^>C:)(3) complexes as emitters, that doped with cisIr(tzpPh)(2)(tzpPh)' exhibited superior electroluminescence efficiencies (external quantum efficiency (EQE) of 16.3%, current efficiency of 27.6 cd A(-1), and power efficiency of 22.1 lm W-1) and CIE coordinates of [0.17,0.26], which are superior to those of other Ir(C-tzp<^>C:)(3) complexes and Ir(dmp)(3) (dmp = 3-(2,6-dimethylphenyl)-7-methylimidazo[1,2-f]phenanthridine). This study provides insight into the molecular-level engineering of Ir(III) dopant materials for improving the emission efficiencies of phosphorescent OLEDs. | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | AMER CHEMICAL SOC | - |
dc.subject | IRIDIUM(III) COMPLEXES | - |
dc.subject | METAL-COMPLEXES | - |
dc.subject | CARBENE | - |
dc.subject | LIGANDS | - |
dc.subject | DELOCALIZATION | - |
dc.subject | EMITTERS | - |
dc.title | Synthesis and Characterization of Blue Phosphorescent NHC-Ir(III) Complexes with Annulated Heterocyclic 1,2,4-Triazolophenanthridine Derivatives for Highly Efficient PhOLEDs | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Son, Ho-Jin | - |
dc.contributor.affiliatedAuthor | Kang, Sang Ook | - |
dc.identifier.doi | 10.1021/acsaelm.2c00235 | - |
dc.identifier.wosid | 000819180500001 | - |
dc.identifier.bibliographicCitation | ACS APPLIED ELECTRONIC MATERIALS, v.4, no.6, pp.2699 - 2710 | - |
dc.relation.isPartOf | ACS APPLIED ELECTRONIC MATERIALS | - |
dc.citation.title | ACS APPLIED ELECTRONIC MATERIALS | - |
dc.citation.volume | 4 | - |
dc.citation.number | 6 | - |
dc.citation.startPage | 2699 | - |
dc.citation.endPage | 2710 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Engineering | - |
dc.relation.journalResearchArea | Materials Science | - |
dc.relation.journalWebOfScienceCategory | Engineering, Electrical & Electronic | - |
dc.relation.journalWebOfScienceCategory | Materials Science, Multidisciplinary | - |
dc.subject.keywordPlus | IRIDIUM(III) COMPLEXES | - |
dc.subject.keywordPlus | METAL-COMPLEXES | - |
dc.subject.keywordPlus | CARBENE | - |
dc.subject.keywordPlus | LIGANDS | - |
dc.subject.keywordPlus | DELOCALIZATION | - |
dc.subject.keywordPlus | EMITTERS | - |
dc.subject.keywordAuthor | phosphorescent Ir(III) complex | - |
dc.subject.keywordAuthor | triazolophenanthridine-based chelating ligand | - |
dc.subject.keywordAuthor | N-heterocyclic carbene moiety | - |
dc.subject.keywordAuthor | excited-state property | - |
dc.subject.keywordAuthor | blue PhOLED | - |
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