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DC Field | Value | Language |
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dc.citation.endPage | 24666 | - |
dc.citation.number | 43 | - |
dc.citation.startPage | 24655 | - |
dc.citation.title | JOURNAL OF PHYSICAL CHEMISTRY C | - |
dc.citation.volume | 120 | - |
dc.contributor.author | Roh, Deok-Ho | - |
dc.contributor.author | Kim, Kwang Min | - |
dc.contributor.author | Nam, Jung Seung | - |
dc.contributor.author | Kim, Un-Young | - |
dc.contributor.author | Kim, Byung-Man | - |
dc.contributor.author | Kim, Jeong-Soo | - |
dc.contributor.author | Kwon, Tae-Hyuk | - |
dc.date.accessioned | 2023-12-21T23:08:23Z | - |
dc.date.available | 2023-12-21T23:08:23Z | - |
dc.date.created | 2016-10-16 | - |
dc.date.issued | 2016-11 | - |
dc.description.abstract | Benzo[c][1,2,5]thiadiazole (BT) has been used in dye-sensitized solar cells (DSCs) for its light-harvesting abilities. However, as a strongly electron deficient unit, BT causes rapid back electron transfer (BET), which in turn lowers the photo conversion efficiency (PCE) of devices. Herein, we report a powerful strategy for retarding BET by controlling both the photoelectrode thickness and π-spacer dihedral angle. To achieve this, we introduced planar (BT-T) or twisted π-spacers (BT-P, BT-MP, and BT-HT) between BT units and anchoring groups, and used different photoelectrode thicknesses between 1.8 and 10 μm. Computational and experimental results show that twisted π-spacers were more efficient at retarding BET than the planar π-spacer. However, BET was found to be less important than expected, and light harvesting efficiency (LHE) played a critical role as the thickness of the photoelectrode decreased because charge collection efficiency was enhanced. The planar dye BT-T obtained the highest LHE, this value remained unusually high even in 1.8 μm photoelectrodes. As a result, BT-T gave a PCE of 6.5% (Jsc = 13.56 mA/cm2, Voc = 0.67 V and FF = 0.72) in thin 1.8 μm photoelectrodes with 3.5 μm scattering layers, which represented a roughly 40% enhancement compared to the PCE in 10 μm photoelectrodes (4.76%). Overall, these results provide a novel approach to achieving ultrathin and highly efficient flexible DSCs. | - |
dc.identifier.bibliographicCitation | JOURNAL OF PHYSICAL CHEMISTRY C, v.120, no.43, pp.24655 - 24666 | - |
dc.identifier.doi | 10.1021/acs.jpcc.6b08262 | - |
dc.identifier.issn | 1932-7447 | - |
dc.identifier.scopusid | 2-s2.0-84994560066 | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/20627 | - |
dc.identifier.url | http://pubs.acs.org/doi/abs/10.1021/acs.jpcc.6b08262 | - |
dc.identifier.wosid | 000387198400017 | - |
dc.language | 영어 | - |
dc.publisher | AMER CHEMICAL SOC | - |
dc.title | Strategy for Improved Photoconversion Efficiency in Thin Photoelectrode Films by Controlling π-Spacer Dihedral Angle | - |
dc.type | Article | - |
dc.description.isOpenAccess | FALSE | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary | - |
dc.relation.journalResearchArea | Chemistry; Science & Technology - Other Topics; Materials Science | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.subject.keywordPlus | SENSITIZED SOLAR-CELLS | - |
dc.subject.keywordPlus | PORPHYRIN DYES | - |
dc.subject.keywordPlus | ORGANIC-DYES | - |
dc.subject.keywordPlus | LOW-COST | - |
dc.subject.keywordPlus | BENZOTHIADIAZOLE | - |
dc.subject.keywordPlus | CONVERSION | - |
dc.subject.keywordPlus | LIGHT | - |
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