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dc.contributor.authorKim, Soo Jin
dc.contributor.authorMargulis, George Y.
dc.contributor.authorRim, Seung-Bum
dc.contributor.authorBrongersma, Mark L.
dc.contributor.authorMcGehee, Michael D.
dc.contributor.authorPeumans, Peter
dc.date.accessioned2016-02-25T13:20:14Z
dc.date.available2016-02-25T13:20:14Z
dc.date.issued2013-03-14
dc.identifier.citationKim SJ, Margulis GY, Rim S-B, Brongersma ML, McGehee MD, et al. (2013) Geometric light trapping with a V-trap for efficient organic solar cells. Optics Express 21: A305. Available: http://dx.doi.org/10.1364/OE.21.00A305.
dc.identifier.issn1094-4087
dc.identifier.pmid24104418
dc.identifier.doi10.1364/OE.21.00A305
dc.identifier.urihttp://hdl.handle.net/10754/598409
dc.description.abstractThe efficiency of today’s most efficient organic solar cells is primarily limited by the ability of the active layer to absorb all the sunlight. While internal quantum efficiencies exceeding 90% are common, the external quantum efficiency rarely exceeds 70%. Light trapping techniques that increase the ability of a given active layer to absorb light are common in inorganic solar cells but have only been applied to organic solar cells with limited success. Here, we analyze the light trapping mechanism for a cell with a V-shape substrate configuration and demonstrate significantly improved photon absorption in an 5.3%-efficient PCDTBT:PC70BM bulk heterojunction polymer solar cell. The measured short circuit current density improves by 29%, in agreement with model predictions, and the power conversion efficiency increases to 7.2%, a 35% improvement over the performance in the absence of a light trap.
dc.description.sponsorshipThis publication was based on work supported by the Center for Advanced Molecular Photovoltaics (CAMP) (Award No KUS-C1-015-21), made by King Abdullah University of Science and Technology (KAUST). S J. K. and G. M. acknowledges support from the King Abdullah University of Science and Technology (KAUST) Investigator Award (No. KUS-I1-001-12) and the Global Climate and Energy Project at Stanford (GCEP). S J. K. gratefully acknowledges support from the Samsung scholarship. S J. K. also thanks Jason Bloking for assistance with the measurements.
dc.publisherThe Optical Society
dc.titleGeometric light trapping with a V-trap for efficient organic solar cells
dc.typeArticle
dc.identifier.journalOptics Express
dc.contributor.institutionDepartment of Electrical Engineering, Stanford University, Stanford, California 94305, USA
dc.contributor.institutionDepartment of Materials Science and Engineering, Stanford University, Stanford, California 94305 USA
dc.contributor.institutionDepartment of Bio-Nano Electronics, IMEC, Kapeldreef 75, B-3001 Leuven, Belgium
kaust.grant.numberKUS-I1-001-12
kaust.grant.fundedcenterCenter for Advanced Molecular Photovoltaics (CAMP)
dc.date.published-online2013-03-14
dc.date.published-print2013-05-06


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