Journal
OPTICS EXPRESS
Volume 22, Issue 9, Pages A715-A722Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.22.00A715
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Funding
- German Federal Ministry of Education and Research within the project InfraVolt [03SF0401]
- German Federal Environmental Foundation (DBU)
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Angularly selective filters can increase the efficiency of radiatively limited solar cells. A restriction of the acceptance angle is linked to the kind of utilizable solar spectrum (global or direct radiation). This has to be considered when calculating the potential enhancement of both the efficiency and the power output. In this paper, different concepts to realize angularly selective filters are compared regarding their limits for efficiency and power output per unit area. First experimental results of a promising system based on a thin-film filter as the angularly selective element are given to demonstrate the practical relevance of such systems. (C) 2014 Optical Society of America
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