Hybridized local and charge transfer dendrimers with near-unity exciton utilization for enabling high-efficiency solution-processed hyperfluorescent OLEDs
DC Field | Value | Language |
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dc.contributor.author | Yin, Yixiao | - |
dc.contributor.author | Zeng, Songkun | - |
dc.contributor.author | Xiao, Chen | - |
dc.contributor.author | Fan, Peng | - |
dc.contributor.author | Shin, Dong Jin | - |
dc.contributor.author | Kim, Ki Ju | - |
dc.contributor.author | Nam, Hyewon | - |
dc.contributor.author | Ma, Qian | - |
dc.contributor.author | Ma, Huili | - |
dc.contributor.author | Zhu, Weiguo | - |
dc.contributor.author | Kim, Taekyung | - |
dc.contributor.author | Lee, Jun Yeob | - |
dc.contributor.author | Wang, Yafei | - |
dc.date.accessioned | 2024-02-27T03:00:31Z | - |
dc.date.available | 2024-02-27T03:00:31Z | - |
dc.date.issued | 2024-01-16 | - |
dc.identifier.issn | 2051-6347 | - |
dc.identifier.issn | 2051-6355 | - |
dc.identifier.uri | https://scholarworks.bwise.kr/hongik/handle/2020.sw.hongik/32708 | - |
dc.description.abstract | Achieving both high emission efficiency and exciton utilization efficiency (eta S) in hot exciton materials is still a formidable task. Herein, a proof-of-concept design for improving eta S in hot exciton materials is proposed via elaborate regulation of singlet-triplet energy difference, leading to an additional thermally activated delayed fluorescence (TADF) process. Two novel dendrimers, named D-TTT-H and D-TTT-tBu, were prepared and characterized, in which diphenylamine derivatives were used as a donor moiety and tri(triazolo)triazine (TTT) as an acceptor fragment. Compounds D-TTT-H and D-TTT-tBu showed an intense green color with an emission efficiency of approximately 80% in solution. Impressively, both dendrimers simultaneously exhibited a hot exciton process and TADF characteristic in the solid state, as was demonstrated via theoretical calculation, transient photoluminescence, magneto-electroluminescence and transient electroluminescence measurements, thus achieving almost unity eta S. A solution processable organic light-emitting diode (OLED) employing the dendrimer as a dopant represents the best performance with the highest luminance of 15090 cd m-2 and a maximum external quantum efficiency (EQEmax) of 11.96%. Moreover, using D-TTT-H as a sensitizer, an EQEmax of 30.88%, 24.08% and 14.33% were achieved for green, orange and red solution-processed OLEDs, respectively. This research paves a new avenue to construct a fluorescent molecule with high eta S for efficient and stable OLEDs. Two dendrimers, called D-TTT-H and D-TTT-tBu, were prepared, which exhibits both hot exciton process and TADF characteristic simultaneously in solid state. The solution processable OLED showed an EQEmax of 30.88% employing D-TTT-H as a sensitizer. | - |
dc.format.extent | 11 | - |
dc.language | 영어 | - |
dc.language.iso | ENG | - |
dc.publisher | ROYAL SOC CHEMISTRY | - |
dc.title | Hybridized local and charge transfer dendrimers with near-unity exciton utilization for enabling high-efficiency solution-processed hyperfluorescent OLEDs | - |
dc.type | Article | - |
dc.publisher.location | 영국 | - |
dc.identifier.doi | 10.1039/d3mh01860a | - |
dc.identifier.scopusid | 2-s2.0-85183960495 | - |
dc.identifier.wosid | 001152334000001 | - |
dc.identifier.bibliographicCitation | MATERIALS HORIZONS, v.11, no.7, pp 1741 - 1751 | - |
dc.citation.title | MATERIALS HORIZONS | - |
dc.citation.volume | 11 | - |
dc.citation.number | 7 | - |
dc.citation.startPage | 1741 | - |
dc.citation.endPage | 1751 | - |
dc.type.docType | Article | - |
dc.description.isOpenAccess | N | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Chemistry | - |
dc.relation.journalResearchArea | Materials Science | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Multidisciplinary | - |
dc.relation.journalWebOfScienceCategory | Materials Science, Multidisciplinary | - |
dc.subject.keywordPlus | ELECTROLUMINESCENCE | - |
dc.subject.keywordPlus | PHOSPHORESCENT | - |
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