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The BOSCO solar cell - a both sides collecting and contacted structure

: Fertig, F.; Krauß, K.; Greulich, J.; Clement, F.; Biro, D.; Preu, R.; Rein, S.


Physica status solidi. Rapid research letters 8 (2014), No.5, pp.381-384
ISSN: 1862-6254
ISSN: 1862-6270
Journal Article
Fraunhofer ISE ()
PV Produktionstechnologie und Qualitätssicherung; Silicium-Photovoltaik; Pilotherstellung von industrienahen Solarzellen; Messtechnik und Produktionskontrolle

The BOSCO solar cell represents a bifacial structure with double-sided collection. The structure allows the use of standard module interconnection technology and favours the use of material with low to medium diffusion length and low resistivity for maximum benefit towards other structures, such as Al-BSF and PERC. Within this work, we present first results on different multicrystalline silicon materials yielding a monofacial efficiency of 17.4% on large-area wafers from block-cast mc-Si. This value represents a gain of ~0.7%abs compared to Al-BSF cells processed in parallel. The applicability for bifacial operation is demonstrated by a significantly increased quantum efficiency for rear side illumination. These results make the BOSCO solar cell concept a promising candidate to further boost the output of utility-scale PV plants even when using low-cost wafers of low to medium diffusion length material. Sketch and photographs of the BOSCO solar cell concept.