申論題

3. An abrupt p-n junction with donor concentration = N_D and acceptor concentration = N_A. The diode is very long so you can assume the ends are at x = positive and negative infinity. The diode is forward biased.

(c) If there is no recombination or generation in the depletion region, mathematically show that the electron and hole currents must be constant in this region, and obtain these constant values.