High-performance bipolar host materials for blue TADF devices with excellent external quantum efficiencies
DC Field | Value | Language |
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dc.contributor.author | Kang, Ju Sik | - |
dc.contributor.author | Hong, Tae Ryang | - |
dc.contributor.author | Kim, Hyung Jong | - |
dc.contributor.author | Son, Young Hoon | - |
dc.contributor.author | Lampande, Raju | - |
dc.contributor.author | Kang, Byoung Yeop | - |
dc.contributor.author | Lee, Chiho | - |
dc.contributor.author | Bin, Jong-Kwan | - |
dc.contributor.author | Lee, Bang Sook | - |
dc.contributor.author | Yang, Joong Hwan | - |
dc.contributor.author | Kim, JinWuk | - |
dc.contributor.author | Park, Sungnam | - |
dc.contributor.author | Cho, Min Ju | - |
dc.contributor.author | Kwon, Jang Hyuk | - |
dc.contributor.author | Choi, Dong Hoon | - |
dc.date.accessioned | 2021-09-04T05:00:08Z | - |
dc.date.available | 2021-09-04T05:00:08Z | - |
dc.date.created | 2021-06-18 | - |
dc.date.issued | 2016 | - |
dc.identifier.issn | 2050-7526 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/90144 | - |
dc.description.abstract | New bipolar host molecules composed of carbazole, pyridoindole, and dibenzothiophene (DBT) were synthesized for blue thermally activated delayed fluorescence (TADF)-based organic light-emitting diodes (OLEDs). 2,8-Di(9H-carbazol-9-yl) dibenzo[b,d]thiophene, 9-(8-(9H-carbazol-9-yl)dibenzo[b,d]thiophen-2yl)-9H-pyrido[2,3-b]indole, and 2,8-bis(9H-pyrido[2,3-b]indol-9-yl)dibenzo[b,d]thiophene were prepared based on the selective reactivity at the 2,8-positions of DBT. The new symmetric and asymmetric host materials exhibited high triplet energies (2.89-2.95 eV). 4,5-Di(9H-carbazol-9-yl)phthalonitrile (2CzPN) was selected as an emitting dopant for achieving sky-blue emissions in TADF-OLEDs. 2CzPN-doped TADF-OLEDs, whose configuration is ITO (50 nm)/HATCN (7 nm)/TAPC (75 nm)/host:6% 2CzPN (20 nm)/TmPyPB (50 nm)/LiF (15 nm)/Al (100 nm), showed low driving voltages and high external quantum efficiencies (EQEs). These results are attributed to the well-controlled bipolar character of the host giving a better charge balance in the emitting layer. In particular, the device containing ZDN: 6% 2CzPN showed an unprecedentedly high EQE of 25.7% (at 0.074 mA cm(-2)). | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | ROYAL SOC CHEMISTRY | - |
dc.subject | LIGHT-EMITTING-DIODES | - |
dc.subject | ACTIVATED DELAYED FLUORESCENCE | - |
dc.subject | ELECTROPHOSPHORESCENCE | - |
dc.subject | DERIVATIVES | - |
dc.subject | 25-PERCENT | - |
dc.subject | CARBAZOLE | - |
dc.subject | LIFETIME | - |
dc.subject | SINGLET | - |
dc.title | High-performance bipolar host materials for blue TADF devices with excellent external quantum efficiencies | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Park, Sungnam | - |
dc.contributor.affiliatedAuthor | Choi, Dong Hoon | - |
dc.identifier.doi | 10.1039/c6tc00385k | - |
dc.identifier.wosid | 000377141300019 | - |
dc.identifier.bibliographicCitation | JOURNAL OF MATERIALS CHEMISTRY C, v.4, no.20, pp.4512 - 4520 | - |
dc.relation.isPartOf | JOURNAL OF MATERIALS CHEMISTRY C | - |
dc.citation.title | JOURNAL OF MATERIALS CHEMISTRY C | - |
dc.citation.volume | 4 | - |
dc.citation.number | 20 | - |
dc.citation.startPage | 4512 | - |
dc.citation.endPage | 4520 | - |
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 | LIGHT-EMITTING-DIODES | - |
dc.subject.keywordPlus | ACTIVATED DELAYED FLUORESCENCE | - |
dc.subject.keywordPlus | ELECTROPHOSPHORESCENCE | - |
dc.subject.keywordPlus | DERIVATIVES | - |
dc.subject.keywordPlus | 25-PERCENT | - |
dc.subject.keywordPlus | CARBAZOLE | - |
dc.subject.keywordPlus | LIFETIME | - |
dc.subject.keywordPlus | SINGLET | - |
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