Well-dispersed Te-doped mesoporous carbons as Pt-free counter electrodes for high-performance dye-sensitized solar cells
DC Field | Value | Language |
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dc.contributor.author | Ji, Jung-Min | - |
dc.contributor.author | Kim, Chang Ki | - |
dc.contributor.author | Kim, Hwan Kyu | - |
dc.date.accessioned | 2021-11-17T02:41:06Z | - |
dc.date.available | 2021-11-17T02:41:06Z | - |
dc.date.created | 2021-08-30 | - |
dc.date.issued | 2021-07-21 | - |
dc.identifier.issn | 1477-9226 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/127706 | - |
dc.description.abstract | A tellurium-doped carbon nanomaterial (Te-MC(P)) was newly developed by the soft-templated carbonization of the PAN-b-PBA copolymer with poly(3-hexyltellurophene). Te-MC(P) was characterized with various characterization methods, including the nitrogen sorption isotherm measurement (BET), X-ray photoelectron spectroscopy (XPS) and energy-dispersive X-ray spectroscopy (EDS), which reveal that the Te atoms are homogeneously dispersed in the three-dimensional hierarchical, graphite-like mesoporous carbon matrix with a Te doping level of 0.27 atom %. Based on the characterization results, the electrocatalytic ability of Te-MC(P) was evaluated by using a symmetrical dummy cell test with both Co(bpy)(3)(2+/3+) (bpy = 2,2 '-bipyridine) and I-/I-3(-) redox electrolytes as counter electrodes (CEs). The Te-MC(P) CEs showed remarkably lower charge-transfer resistance (R-ct) values by approximately 10 times in the electrochemical impedance spectroscopy (EIS) measurement, compared to the counterpart platinum (Pt) and the tellurium-based material (Te-MC(A)), prepared with a telluric acid precursor that has a lower Te doping level of 0.15 at%. As a result, the excellent electrocatalytic ability of Te-MC(P) resulted in the improvement of photovoltaic performance. The power conversion efficiencies (PCEs) of Te-MC(P)-based dye-sensitized solar cells (DSSCs) were 12.69% for the Co(bpy)(3)(2+/3+) redox electrolyte with the SGT-021 porphyrin dye and 9.73% for the I-/I-3(-) redox electrolyte with the N719 ruthenium dye. Furthermore, Te- MC(P) CEs exhibited remarkable electrochemical stability in the two redox electrolytes. These results could suggest that the Te-MC(P) CE is one of the best promising alternatives to Pt CEs as a low-cost, highly stable and efficient electrocatalytic CE for practical applications. | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | ROYAL SOC CHEMISTRY | - |
dc.subject | GRAPHENE NANOPLATELETS | - |
dc.subject | NITROGEN | - |
dc.subject | NANOMATERIALS | - |
dc.subject | DESIGN | - |
dc.subject | OXIDE | - |
dc.title | Well-dispersed Te-doped mesoporous carbons as Pt-free counter electrodes for high-performance dye-sensitized solar cells | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Kim, Hwan Kyu | - |
dc.identifier.doi | 10.1039/d0dt04372a | - |
dc.identifier.scopusid | 2-s2.0-85109994137 | - |
dc.identifier.wosid | 000669578200001 | - |
dc.identifier.bibliographicCitation | DALTON TRANSACTIONS, v.50, no.27, pp.9399 - 9409 | - |
dc.relation.isPartOf | DALTON TRANSACTIONS | - |
dc.citation.title | DALTON TRANSACTIONS | - |
dc.citation.volume | 50 | - |
dc.citation.number | 27 | - |
dc.citation.startPage | 9399 | - |
dc.citation.endPage | 9409 | - |
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, Inorganic & Nuclear | - |
dc.subject.keywordPlus | GRAPHENE NANOPLATELETS | - |
dc.subject.keywordPlus | NITROGEN | - |
dc.subject.keywordPlus | NANOMATERIALS | - |
dc.subject.keywordPlus | DESIGN | - |
dc.subject.keywordPlus | OXIDE | - |
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