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DC Field Value Language Khan, Firoz - Kim, Jae Hyeon - 2018-10-30T05:59:15Z - 2018-10-30T05:59:15Z - 2018-10-30 - 2018-11 -
dc.identifier.citation ACS Photonics, v.5, no.11, pp.4637 - 4643 -
dc.identifier.issn 2330-4022 -
dc.identifier.uri -
dc.description.abstract Copper indium gallium selenide (CIGS) is the most promising thin film solar cell technology. However, its high performance is hampered by its poor short-wavelength response. The short-wavelength response can be enhanced via photon downconversion using quantum dots. Unfortunately, most graphene quantum dots (GQDs) are not suitable as downconverters in CIGS cells owing to their low photoluminescence quantum yield (PL QY) and/or low Stokes shift. Herein, an ultrahigh PL QY (99%) and a large Stokes shift (98 nm) are achieved for N-doped GQDs via a novel method. The performance of a CIGS solar cell is enhanced via photon downconversion and the light-trapping effect using the NGQDs. The effectiveness of the NQGDs is manifested in a conversion efficiency (η) of 15.31%. In addition, improvements in the short-circuit current density from 30.69 mA/cm2 to 31.77 mA/cm2 and fill factor from 71.25% to 73.09% are observed. The n and J0 values are decreased by insertion of NGQDs, indicating a reduction in the recombination losses. © 2018 American Chemical Society. -
dc.language English -
dc.publisher American Chemical Society -
dc.title N-Functionalized Graphene Quantum Dots with Ultrahigh Quantum Yield and Large Stokes Shift: Efficient Downconverters for CIGS Solar Cells -
dc.type Article -
dc.identifier.doi 10.1021/acsphotonics.8b01125 -
dc.identifier.wosid 000451496500057 -
dc.identifier.scopusid 2-s2.0-85054902181 -
dc.type.local Article(Overseas) -
dc.type.rims ART -
dc.description.journalClass 1 -
dc.citation.publicationname ACS Photonics -
dc.contributor.nonIdAuthor Khan, Firoz -
dc.identifier.citationVolume 5 -
dc.identifier.citationNumber 11 -
dc.identifier.citationStartPage 4637 -
dc.identifier.citationEndPage 4643 -
dc.identifier.citationTitle ACS Photonics -
dc.type.journalArticle Article -
dc.description.isOpenAccess N -
dc.subject.keywordAuthor N-doped graphene quantum dots -
dc.subject.keywordAuthor downconverters -
dc.subject.keywordAuthor quantum yield -
dc.subject.keywordAuthor N moieties -
dc.subject.keywordAuthor CIGS solar cells -
dc.subject.keywordPlus DOPED GRAPHENE -
dc.subject.keywordPlus ENHANCEMENT -
dc.subject.keywordPlus TEMPERATURE -
dc.subject.keywordPlus PARAMETERS -
dc.contributor.affiliatedAuthor Khan, Firoz -
dc.contributor.affiliatedAuthor Kim, Jae Hyeon -
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Division of Energy Technology 1. Journal Articles


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