Question: A semiconductor is having hole diffusion coefficient of 8 cm^2/s and hole density given by a function of p(x) = 10^6exp(-x/L) where x is position

A semiconductor is having hole diffusion coefficient of 8 cm^2/s and hole density given by a function of p(x) = 10^6exp(-x/L) where x is position and L is 2x10^-4 cm. Determine the current density in A/cm^2 at position x=0.

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