The discussion centers on the behavior of drift velocity in P-N junctions under reverse bias conditions. When a P-N junction is reverse biased, the drift velocity of charge carriers increases due to a stronger electric field in the depletion region. However, this does not lead to significant current flow, as the reverse current is primarily dependent on the rate of carrier generation within the depletion zone rather than solely on drift velocity. The reverse current remains weakly dependent on the applied reverse voltage.
PREREQUISITESElectrical engineers, semiconductor physicists, and students studying electronic devices will benefit from this discussion, particularly those interested in the behavior of P-N junctions under various biasing conditions.
nickhobbs said:When a P-N junction is in reverse bias, the drift velocity of the system increases, so why is there no current flow? Is the drift velocity not connected to the current?
In the depletion zone (when in reverse bias) there is a steeper potential gradient and so the drift current increases?drvrm said:pl. explain how the drift velocity increases in a biased p-n junction.
moreover Is the current dependent on drift velocity if a voltage is applied?
Actually, there is a current flowing. It is called reverse current and it is only weakly dependent on the reverse voltage.nickhobbs said:When a P-N junction is in reverse bias, the drift velocity of the system increases, so why is there no current flow?