(Solved): The hole concentration in a region of silicon is given below. Calculate the hole diffusion current ...

The hole concentration in a region of silicon is given below. Calculate the hole diffusion current density at room temperature. Assume that the hole mobility is \( 120 \mathrm{~cm}^{2} / \mathrm{V} . \mathrm{s} \) and \( \mathrm{W}_{\mathrm{B}}=0.40 \mu \mathrm{m} \)