Geometric light trapping with a V-trap for efficient organic solar cells
AuthorsKim, Soo Jin
Margulis, George Y.
Brongersma, Mark L.
McGehee, Michael D.
KAUST Grant NumberKUS-I1-001-12
MetadataShow full item record
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.
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.
SponsorsThis 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.
PublisherThe Optical Society
CollectionsPublications Acknowledging KAUST Support
- Dielectric nanostructures for broadband light trapping in organic solar cells.
- Authors: Raman A, Yu Z, Fan S
- Issue date: 2011 Sep 26
- Efficient ternary blend bulk heterojunction solar cells with tunable open-circuit voltage.
- Authors: Khlyabich PP, Burkhart B, Thompson BC
- Issue date: 2011 Sep 21
- Design of high efficiency organic solar cell with light trapping.
- Authors: Song L, Uddin A
- Issue date: 2012 Sep 10
- Ultrathin, high-efficiency, broad-band, omni-acceptance, organic solar cells enhanced by plasmonic cavity with subwavelength hole array.
- Authors: Chou SY, Ding W
- Issue date: 2013 Jan 14
- Understanding polycarbazole-based polymer:CdSe hybrid solar cells.
- Authors: Lek JY, Lam YM, Niziol J, Marzec M
- Issue date: 2012 Aug 10