Geometric light trapping with a V-trap for efficient organic solar cells

Handle URI:
http://hdl.handle.net/10754/598409
Title:
Geometric light trapping with a V-trap for efficient organic solar cells
Authors:
Kim, Soo Jin; Margulis, George Y.; Rim, Seung-Bum; Brongersma, Mark L.; McGehee, Michael D.; Peumans, Peter
Abstract:
The 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.
Citation:
Kim 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.
Publisher:
The Optical Society
Journal:
Optics Express
KAUST Grant Number:
KUS-I1-001-12
Issue Date:
14-Mar-2013
DOI:
10.1364/OE.21.00A305
PubMed ID:
24104418
Type:
Article
ISSN:
1094-4087
Sponsors:
This 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.
Appears in Collections:
Publications Acknowledging KAUST Support

Full metadata record

DC FieldValue Language
dc.contributor.authorKim, Soo Jinen
dc.contributor.authorMargulis, George Y.en
dc.contributor.authorRim, Seung-Bumen
dc.contributor.authorBrongersma, Mark L.en
dc.contributor.authorMcGehee, Michael D.en
dc.contributor.authorPeumans, Peteren
dc.date.accessioned2016-02-25T13:20:14Zen
dc.date.available2016-02-25T13:20:14Zen
dc.date.issued2013-03-14en
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.en
dc.identifier.issn1094-4087en
dc.identifier.pmid24104418en
dc.identifier.doi10.1364/OE.21.00A305en
dc.identifier.urihttp://hdl.handle.net/10754/598409en
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.en
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.en
dc.publisherThe Optical Societyen
dc.titleGeometric light trapping with a V-trap for efficient organic solar cellsen
dc.typeArticleen
dc.identifier.journalOptics Expressen
dc.contributor.institutionDepartment of Electrical Engineering, Stanford University, Stanford, California 94305, USAen
dc.contributor.institutionDepartment of Materials Science and Engineering, Stanford University, Stanford, California 94305 USAen
dc.contributor.institutionDepartment of Bio-Nano Electronics, IMEC, Kapeldreef 75, B-3001 Leuven, Belgiumen
kaust.grant.numberKUS-I1-001-12en
kaust.grant.fundedcenterCenter for Advanced Molecular Photovoltaics (CAMP)en

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