Question-1: At a forward bias of 0.2 V, calculate the minority electron concentration at the junction edge (or depletion edge) of the p-type. Assume that the minority electron concentration at equilibrium is np0 = 1000 electrons/cm3 and use the formula np = np0 exp(V/VT) where VT = 0.025 V at room temperature.

Answer:

V=0.2 Volts:    np = np0 exp(V/VT) = 1E3 * exp(0.2/0.025) = 1E3 * 2.981E3= 2.981E6 electrons/cm3.