Significant light absorption enhancement by a single heterocyclic unit change in the pi-bridge moiety from thieno[3,2-b]benzothiophene to thieno[3,2-b]indole for high performance dye-sensitized and tandem 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 | Yoo, Youngjun | - |
dc.contributor.author | Kim, Jeongho | - |
dc.contributor.author | Kim, Hwan Kyu | - |
dc.date.accessioned | 2021-09-03T09:36:57Z | - |
dc.date.available | 2021-09-03T09:36:57Z | - |
dc.date.created | 2021-06-16 | - |
dc.date.issued | 2017-02-07 | - |
dc.identifier.issn | 2050-7488 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/84461 | - |
dc.description.abstract | The molecular design of organic sensitizers is one of the fundamental factors for high-efficiency dye-sensitized solar cells (DSSCs). In this study, we first utilize the alkylated thieno[3,2-b]indole (TI) moiety as the pi-bridge unit to enhance the pi-bridge capability of the thieno[3,2-b]benzothiophene (TBT) used in organic sensitizers. To improve the spectral response of the SGT-130 reference dye, we strategically designed and synthesized two novel TI-based organic sensitizers, SGT-136 and SGT-137, through a simple change of the pi-bridge unit. By replacing the TBT with the alkylated TI moiety, SGT-136 and SGT-137 could have a red-shifted absorption band and upshifted highest occupied molecular orbital (HOMO) energy level. As a result, the SGT-137-based DSSC exhibits a higher PCE (12.45%) than that based on SGT-130 (9.83%) owing to the improvement of current density and retardation of charge recombination by the hexyl substituted TI unit. These results indicate that the TI moiety is a good candidate for remarkable pi-electronic mediators in D-pi-A organic sensitizers with the characteristic of facile synthesis compared to other complicated pi-bridges. Furthermore, the parallel-connected tandem device with SGT-137 and SGT-021 porphyrin-based DSSCs shows a significantly improved current density (22.06 mA cm(-2)) and PCE (14.64%), which is the highest value reported for organic-based tandem solar cells to date. | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | ROYAL SOC CHEMISTRY | - |
dc.subject | A ORGANIC SENSITIZERS | - |
dc.subject | METAL-FREE CATHODES | - |
dc.subject | LONG ALKYL GROUP | - |
dc.subject | GRAPHENE NANOPLATELETS | - |
dc.subject | ELECTRON-DONOR | - |
dc.subject | CONVERSION EFFICIENCY | - |
dc.subject | SILYL-ANCHOR | - |
dc.subject | CYCLOPENTADITHIOPHENE | - |
dc.subject | COADSORBENT | - |
dc.subject | DESIGN | - |
dc.title | Significant light absorption enhancement by a single heterocyclic unit change in the pi-bridge moiety from thieno[3,2-b]benzothiophene to thieno[3,2-b]indole for high performance dye-sensitized and tandem solar cells | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Kim, Hwan Kyu | - |
dc.identifier.doi | 10.1039/c6ta09836c | - |
dc.identifier.scopusid | 2-s2.0-85011272774 | - |
dc.identifier.wosid | 000395074300056 | - |
dc.identifier.bibliographicCitation | JOURNAL OF MATERIALS CHEMISTRY A, v.5, no.5, pp.2297 - 2308 | - |
dc.relation.isPartOf | JOURNAL OF MATERIALS CHEMISTRY A | - |
dc.citation.title | JOURNAL OF MATERIALS CHEMISTRY A | - |
dc.citation.volume | 5 | - |
dc.citation.number | 5 | - |
dc.citation.startPage | 2297 | - |
dc.citation.endPage | 2308 | - |
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.journalResearchArea | Energy & Fuels | - |
dc.relation.journalResearchArea | Materials Science | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Physical | - |
dc.relation.journalWebOfScienceCategory | Energy & Fuels | - |
dc.relation.journalWebOfScienceCategory | Materials Science, Multidisciplinary | - |
dc.subject.keywordPlus | A ORGANIC SENSITIZERS | - |
dc.subject.keywordPlus | METAL-FREE CATHODES | - |
dc.subject.keywordPlus | LONG ALKYL GROUP | - |
dc.subject.keywordPlus | GRAPHENE NANOPLATELETS | - |
dc.subject.keywordPlus | ELECTRON-DONOR | - |
dc.subject.keywordPlus | CONVERSION EFFICIENCY | - |
dc.subject.keywordPlus | SILYL-ANCHOR | - |
dc.subject.keywordPlus | CYCLOPENTADITHIOPHENE | - |
dc.subject.keywordPlus | COADSORBENT | - |
dc.subject.keywordPlus | DESIGN | - |
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