Journal
OPTICS EXPRESS
Volume 16, Issue 26, Pages 21608-21615Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.16.021608
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Funding
- EC-funded project NaPa [NMP4-CT-2003-500120]
- Swedish Strategic Research Foundation SSF
- Knut and Alice Wallenberg Foundation
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We demonstrate a novel light trapping configuration based on an array of micro lenses in conjunction with a self aligned array of micro apertures located in a highly reflecting mirror. When locating the light trapping element, that displays strong directional asymmetric transmission, in front of thin film organic photovoltaic cells, an increase in cell absorption is obtained. By recycling reflected photons that otherwise would be lost, thinner films with more beneficial electrical properties can effectively be deployed. The light trapping element enhances the absorption rate of the solar cell and increases the photocurrent by as much as 25%. (C) 2008 Optical Society of America
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