Consider a Si pn junction with doping concentrations Na $=5$ x $1016$ cm $3$ and Na $=1016$ cm$-3.$

The junction cross$-$sectional area is A $=10-3$ cm$2$ and the applied forward$-$bias voltage is Va $=$

$1\mathrm{.}10$ V$.$ Calculate the $($a$)$ minority electron diffusion current at the edge of the space charge region,

$($b$)$ minority hole diffusion current at the edge of the space charge region, and $($c$)$ total current in the

pn junction diode.