Influence of defect type on hydrogen passivation efficacy in multicrystalline silicon solar cells

نویسندگان

  • A. Zuschlag
  • G. Hahn
  • T. Buonassisi
چکیده

We examine the effectiveness of hydrogen passivation as a function of defect type and microstructure at grain boundaries (GBs) in multicrystalline silicon. We analyze a solar cell with alternating mm-wide bare and SiN.,-coated stripes us ing laser-beam-i nduced current, electron backscatter diffraction, X-ray fluorescence microscopy, and defect etching to correlate preand post-hydrogenation recombination activity with GB character, density of iron-silicide nanoprecipitates , and dislocations. A strong correlation was found between GB recombination activity and the nature/density of etch pits along the boundaries, while iron silicide precipitates above detection limits were found to playa less significant role.

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تاریخ انتشار 2011