試題詳解

Problem 19
Which of the following statements for a p-n diode are correct?
(A) Under the unbiased condition, the Fermi levels in p and n regions are aligned.
(B) When no voltage is applied, the thermal electron current and the recombination electron current have the same magnitude but flow in opposite directions, resulting in no net current.
(C) Under reverse bias, the recombination current is less than the thermal electron current.
(D) When a positive voltage is applied to the p-side, the conventional current flows in the same direction as the electron current.
(E) The photon energy emitted by a light-emitting diode corresponds to the energy gap during the transition of carrier under forward bias.