Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 411750
Title Geometric Light Confinement in a-Si Thin Film Solar Cells on Micro-Structured Substrates
Author(s) Jong, M.M. de; Rath, J.K.; Schropp, R.E.I.; Sonneveld, P.J.; Swinkels, G.L.A.M.; Holterman, H.J.; Baggerman, J.; Rijn, C.J.M. van
Source In: Proceedings of the 26th European Photovoltaic Solar Energy Conference and Exhibition, 05-09 Sept. 2011, Hamburg, Germany. - - p. 370 - 372.
Event 26h EU PVSEC (European Photovoltaic Solar Energy Conference and Exhibition), 2011-09-05/2011-09-08
Department(s) WUR GTB Tuinbouw Technologie
PPO/PRI AGRO Field Technology Innovations
Laboratory for Organic Chemistry
Publication type Contribution in proceedings
Publication year 2011
Abstract In this work we propose and study a light trapping scheme for thin film silicon solar cells that is based on geometrical light trapping (instead of textures optimized for light scattering), using periodically arranged pyramidal structures with dimensions larger than the effective wavelength of light. We studied the absorption behavior of amorphous silicon (a-Si) layers on such a pyramidal structured substrate using ray tracing calculations. According to the calculations, for pyramids on a square base, the maximum relative light absorption enhancement for normal incident light occurs at pyramid angles between 40° to 45°, which results in an increase of the weighted absorption of 45%. For diffuse light a maximum in light trapping yields an absorption increase of 40% compared to a flat structure. a-Si solar cells in a p-i-n configuration deposited at low temperature (125°C) on a micro-pyramidal structured polycarbonate substrate were used as proof-of-concept of this new light trapping scheme for the current enhancement. The cells deposited on the structured substrates showed an increase in short-circuit current density of 24% compared to the reference solar cell structures on flat glass substrates.
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