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Baek, Jong-Beom
Center for Dimension-Controllable Organic Frameworks
Research Interests
  • Covalent Organic Frameworks (COFs), Carbon Nanotubes(CNTs), graphene, Energy Conversion and Storage

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N-Doped Graphene Nanoplatelets as Superior Metal-Free Counter Electrodes for Organic Dye-Sensitized Solar Cells

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dc.contributor.author Ju, Myung Jong ko
dc.contributor.author Kim, Jae Cheon ko
dc.contributor.author Choi, Hyun-Jung ko
dc.contributor.author Choi, In Taek ko
dc.contributor.author Kim, Sang Gyun ko
dc.contributor.author Lim, Kimin ko
dc.contributor.author Ko, Jaejung ko
dc.contributor.author Lee, Jae-Joon ko
dc.contributor.author Jeon, In-Yup ko
dc.contributor.author Baek, Jong-Beom ko
dc.contributor.author Kim, Hwan Kyu ko
dc.date.available 2014-04-14T00:27:50Z -
dc.date.created 2013-08-28 ko
dc.date.issued 2013-06 -
dc.identifier.citation ACS NANO, v.7, no.6, pp.5243 - 5250 ko
dc.identifier.issn 1936-0851 ko
dc.identifier.uri https://scholarworks.unist.ac.kr/handle/201301/4262 -
dc.identifier.uri http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84879671069 ko
dc.description.abstract Highly efficient counter electrodes (CEs) for dye-sensitized solar cells (DSScs) were developed using thin films of scalable and high-quality, nitrogen-doped graphene nanoplatelets (NGnP), which was synthesized by a simple two-step reaction sequence. The resultant NGnP was deposited on fluorine-doped SnO2 (FTO)/glass substrates by using electrospray (e-spray) coating, and their electrocatalytic activities were systematically evaluated for Co(bpy)(3)(3+/2+) redox couple in DSSCs with an organic sensitizer. The e-sprayed NGnP thin films exhibited outstanding performances as CEs for DSSCs. The optimized NGnP electrode showed better electrochemical stability under prolonged cycling potential, and its R-ct at the interface of the CE/electrolyte decreased down to 1.73 Omega cm(2), a value much lower than that of the Pt electrode (3.15 Omega cm(2)). The DSSC with the optimized NGnP-CE had a higher fill factor (FF, 74.2%) and a cell efficiency (9.05%), whereas those of the DSSC using Pt-CE were only 70.6% and 8.43%, respectively. To the best of our knowledge, the extraordinarily better current voltage characteristics of the DSSC-NGnP outperforming the DSSC-Pt for the Co(bpy)(3)(3+/2+) redox couple (in paticular, FF and short circuit current, J(sc)) is highlighted for the first time. ko
dc.description.statementofresponsibility close -
dc.language ENG ko
dc.publisher AMER CHEMICAL SOC ko
dc.subject Charge transfer resistance ko
dc.subject Dye-Sensitized solar cell ko
dc.subject Electrocatalytic activity ko
dc.subject Graphene nanoplatelets ko
dc.subject Redox couple ko
dc.title N-Doped Graphene Nanoplatelets as Superior Metal-Free Counter Electrodes for Organic Dye-Sensitized Solar Cells ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-84879671069 ko
dc.identifier.wosid 000321093800060 ko
dc.type.rims ART ko
dc.description.wostc 42 *
dc.description.scopustc 25 *
dc.date.tcdate 2015-02-28 *
dc.date.scptcdate 2014-08-25 *
dc.identifier.doi 10.1021/nn4009774 ko
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