New thieno[3,2-b][1]benzothiophene-based organic sensitizers containing pi-extended thiophene spacers for efficient dye-sensitized solar cells
DC Field | Value | Language |
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dc.contributor.author | Eom, Yu Kyung | - |
dc.contributor.author | Kang, Sung Ho | - |
dc.contributor.author | Choi, In Taek | - |
dc.contributor.author | Kim, Eunji | - |
dc.contributor.author | Kim, Jeongho | - |
dc.contributor.author | Ju, Myung Jong | - |
dc.contributor.author | Kim, Hwan Kyu | - |
dc.date.accessioned | 2021-09-05T01:19:34Z | - |
dc.date.available | 2021-09-05T01:19:34Z | - |
dc.date.created | 2021-06-15 | - |
dc.date.issued | 2015 | - |
dc.identifier.issn | 2046-2069 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/96380 | - |
dc.description.abstract | Three new thieno[3,2-b][1]benzothiophene (TBT)-based D-pi-A organic sensitizers containing the thiophene pi-spacer (SGT-121, 123 and 125) have been synthesized for the application of dye-sensitized solar cell (DSSC), where TBT was employed as a new fused pi-bridge unit using the advantages of good co-planarity with the linkage between the thiophene unit and the phenyl unit of the triphenylamine group. Specifically, the combination of a dihexyloxyphenyl-substituted biphenylamine donor and the TBT pi-bridge plays multifunctional roles, e.g., the enhanced ability of the pi-bridge and donor, slow charge recombination and prevention of dye aggregation in the D-pi-A sensitizer. The photophysical, electrochemical and photovoltaic properties of the SGT sensitizers were systematically investigated. As a strategy for the improvement of absorption abilities, the various thiophene derivatives, e.g., those with thiophene (T, SGT-121), bithiophene (BT, SGT-123) and thienothio[3,2-b] thiophene (TT, SGT-125) moieties, were incorporated as pi-spacers between the TBT pi-bridge and the acceptor unit. The introduction of thiophene pi-spacers significantly improved the photovoltaic performance (in particular, in terms of the photocurrent J(sc) and open-circuit voltage V-oc) compared to SGT-127 without the thiophene unit. The SGT sensitizers were systematically evaluated for DSSCs based on the Co(bpy)(3)(2+/3+)(bpy = 2,2'-bipyridine) redox couple. Among the four SGT sensitizers, SGT-123-based DSSC including the BT moiety exhibited the highest power conversion efficiency of 9.69%, J(sc) of 16.16 mA cm(-2), V-oc of 830 mV and fill factor of 0.72. These results present the impact of thiophene pi-spacers for enhancing the photovoltaic performances of a D-pi-A organic sensitizer. | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | ROYAL SOC CHEMISTRY | - |
dc.subject | MOLAR EXTINCTION COEFFICIENT | - |
dc.subject | BAND-GAP CHROMOPHORES | - |
dc.subject | METAL-FREE CATHODES | - |
dc.subject | GRAPHENE NANOPLATELETS | - |
dc.subject | CHARGE RECOMBINATION | - |
dc.subject | A SENSITIZERS | - |
dc.subject | COUMARIN DYES | - |
dc.subject | ENERGY-LEVELS | - |
dc.subject | DONOR | - |
dc.subject | LIGHT | - |
dc.title | New thieno[3,2-b][1]benzothiophene-based organic sensitizers containing pi-extended thiophene spacers for efficient dye-sensitized solar cells | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Kim, Hwan Kyu | - |
dc.identifier.doi | 10.1039/c5ra15100g | - |
dc.identifier.scopusid | 2-s2.0-84942243715 | - |
dc.identifier.wosid | 000362409800097 | - |
dc.identifier.bibliographicCitation | RSC ADVANCES, v.5, no.98, pp.80859 - 80870 | - |
dc.relation.isPartOf | RSC ADVANCES | - |
dc.citation.title | RSC ADVANCES | - |
dc.citation.volume | 5 | - |
dc.citation.number | 98 | - |
dc.citation.startPage | 80859 | - |
dc.citation.endPage | 80870 | - |
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, Multidisciplinary | - |
dc.subject.keywordPlus | MOLAR EXTINCTION COEFFICIENT | - |
dc.subject.keywordPlus | BAND-GAP CHROMOPHORES | - |
dc.subject.keywordPlus | METAL-FREE CATHODES | - |
dc.subject.keywordPlus | GRAPHENE NANOPLATELETS | - |
dc.subject.keywordPlus | CHARGE RECOMBINATION | - |
dc.subject.keywordPlus | A SENSITIZERS | - |
dc.subject.keywordPlus | COUMARIN DYES | - |
dc.subject.keywordPlus | ENERGY-LEVELS | - |
dc.subject.keywordPlus | DONOR | - |
dc.subject.keywordPlus | LIGHT | - |
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