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At what electron and hole concentrations is the resistivity of a semiconductor a maximum? Give numerical values for Si at 300K.

Note in practice one cannot refine Si to such a purity, however, this can occur in a p/n junction where N_DD=N_AA and p=n=n_i at the intrinsic or p/n boundary.

However, the resistivity is an irrelevant quantity in the space-charge layer of a p/n Junction.

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