Numericals on Diode Current
Diode Current-Voltage Relation: The current-voltage relationship in a diode can be derived from semiconductor physics principles, specifically considering the behavior of charge carriers (electrons and holes) in a semiconductor junction. Here, I'll outline the derivation of the diode current equation, commonly known as the Shockley diode equation. Assumptions: Quasi-Fermi Levels: The derivation assumes that the electron and hole densities remain close to their equilibrium values, and therefore the quasi-Fermi levels for electrons and holes do not significantly change with applied voltage. Low-Level Injection: The derivation assumes low-level injection, meaning that the majority carrier density (electrons in an n-type and holes in a p-type semiconductor) is much greater than the minority carrier density (holes in an n-type and electrons in a p-type semiconductor). 1. Electric Field and Drift Current: When a voltage is applied across the diode, it creates an electric field in the...