Abstract
The influence of the grain boundary recombination velocity and grain size on the spectral response and performance of a solar cell under air mass 1 conditions was calculated on the basis of an idealized two-dimensional model describing solar cells made from polycrystalline silicon material with predominantly columnar orientation. The problem of carrier flow within an individual grain was analysed by solving the diffusion equation using boundary conditions. The grain boundaries were considered as recombination planes characterized by a grain boundary recombination velocity which was assumed not to depend on excitation. Detailed numerical calculations were done for the effect of grain size on V oc , FF and efficiency.
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