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Wafer thickness optimization for silicon solar cells of heterogeneous material quality

 
: Michl, B.; Kasemann, M.; Warta, W.; Schubert, M.C.

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Physica status solidi. Rapid research letters 7 (2013), No.11, pp.955-958
ISSN: 1862-6254
ISSN: 1862-6270
English
Journal Article
Fraunhofer ISE ()
Solarzellen - Entwicklung und Charakterisierung; Silicium-Photovoltaik; Charakterisierung von Prozess- und Silicium-Materialien; Herstellung und Analyse von hocheffizienten Solarzellen; Charakterisierung; Zellen und Module; Silicon; Solar Cell; Thickness; Multicrystalline

Abstract
In this Letter, we introduce a method of calculating the optimal wafer thickness for silicon solar cells with multicrystalline bulk material. The optimal thickness depends on the relation of bulk recombination to surface recombination and the light trapping. For multicrystalline silicon bulk recombination strongly varies laterally and with injection level, which complicates the calculations. A thickness optimization using the "Efficiency Limiting Bulk Recombination Analysis" (ELBA) takes all these effects correctly into account.

: http://publica.fraunhofer.de/documents/N-264417.html