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Kwon, Tae-Hyuk
Energy Recognition
Research Interests
  • Energy transfer, organic solar cells, supercapacitor, ultrasonic spray chemistry, dithienothiophene, iridium complexes, phosphorescent bioapplications

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Highly efficient light-harvesting system based on a phosphorescent acceptor coupled with dendrimer donors via singlet-singlet and triplet-triplet energy transfer

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dc.contributor.author Kwon, Tae-Hyuk ko
dc.contributor.author Kim, Myoung Ki ko
dc.contributor.author Kwon, Jongchul ko
dc.contributor.author Shin, Dae-Yup ko
dc.contributor.author Park, Su Jin ko
dc.contributor.author Lee, Chang-Lyoul ko
dc.contributor.author Kim, Jang-Joo ko
dc.contributor.author Hong, Jong-In ko
dc.date.available 2014-11-14T00:19:05Z -
dc.date.created 2014-11-13 ko
dc.date.issued 2007-07 ko
dc.identifier.citation CHEMISTRY OF MATERIALS, v.19, no.15, pp.3673 - 3680 ko
dc.identifier.issn 0897-4756 ko
dc.identifier.uri https://scholarworks.unist.ac.kr/handle/201301/8765 -
dc.description.abstract A series of efficient light-harvesting systems (FIr3mGx, x = 1-3) based on dendrimer donor (mCP: N,N′-dicarbazolyl-3,5-benzene) derivatives coupled with a sky blue phosphorescent acceptor (FIrpic: iridium(III) bis[(4,6-difluorophenyl)pyridinato-N,C2′]-3-hydroxypicolinate derivative) were prepared, and their photophysical properties were investigated. The light-harvesting ability of FIr3mGx (x = 1-3) increases with the number of energy donor mCP units. The acceptor PL intensity of the donor-acceptor conjugate dendrimers (FIr3mGx, x = 1-3) increases over 6 times with the number of mCP units via sensitization from the light-harvesting antenna after excitation at the donor absorption (λex = 310 nm), as compared to that of only an acceptor without a donor (FIrpic) upon excitation at the MLCT region (λex = 380 nm) because of efficient intramolecular singlet-singlet and triplet-triplet energy transfer from the donor to the acceptor and less luminance quenching induced by the bulky dendrimer structure. The singlet-singlet intramolecular energy transfer in FIr3mGx from the dendrimer donor to the acceptor exhibits a high efficiency of greater than 90% via the steady-state PL method and 94% via the transient PL method. Additionally, the triplet-triplet energy transfer efficiency via the transient PL method exhibits an efficiency greater than 99%. This indicates that FIr3mGx exhibits good light-harvesting abilities because the mCP unit is an efficient light absorber and because the core FIrpic functions as a spatial energy concentrator that drains energy from the dendrimer donor. ko
dc.description.statementofresponsibility close -
dc.language 영어 ko
dc.publisher AMER CHEMICAL SOC ko
dc.title Highly efficient light-harvesting system based on a phosphorescent acceptor coupled with dendrimer donors via singlet-singlet and triplet-triplet energy transfer ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-34547683199 ko
dc.identifier.wosid 000248073300019 ko
dc.type.rims ART ko
dc.description.wostc 58 *
dc.description.scopustc 55 *
dc.date.tcdate 2015-05-06 *
dc.date.scptcdate 2014-11-13 *
dc.identifier.doi 10.1021/cm070536k ko
dc.identifier.url http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=34547683199 ko
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