Abstract
By means of a modification of the model proposed by Koliwad and Daud, the effective diffusion length L nef was computed in terms of intragranular diffusion length L 0 , grain size g and grain boundary recombination activity γ. The theoretical computations were compared with experimental measurements of effective electron diffusion length L nef and grain boundary recombination velocity s m . It is shown that the theoretical and experimental variations of L nef with g depend mainly on the quality of grains and of the activity of grain boundaries.
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