The discussion centers around the behavior of drift velocity in P-N junctions under reverse bias conditions, particularly focusing on the relationship between drift velocity and current flow. Participants explore theoretical aspects and implications of these concepts in semiconductor physics.
Participants express differing views on the relationship between drift velocity and current flow in reverse-biased P-N junctions. While some assert that there is indeed a current (reverse current), others remain uncertain about the connection between drift velocity and current under these conditions.
Participants have not fully resolved the assumptions regarding the dependence of current on drift velocity, particularly in the context of reverse bias and the behavior of charge carriers in the depletion region.
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?