Hi All,
I have a question on the currents in the PN Junction diode. This has been bugging me for a lot of time.
When the PN junction is forward biased, how does the holes from the P-type move into the N-type ?
Since for the fomation of hole in the N-type, a valency electron should occupy the hole near the junction of P-type. But there are free electrons in P-type, which can occupy the holes near junction of P-type, considering the fact that their mobility is higher when compared with holes. Will the valence electrons in N-type has any chance to occupy the holes of P-type, overcoming the speed of free electrons ?
Also when a hole is formed near the junction of N-type, dont you think there is a chance of free electron of n-type taking the placeof that hole. Please answer my question as soon as possible.
Thanks, Beenu