Name of diode depletion region voltage
semiconductor junction is formed when semoconductors with p doped and n doped layers come in contact.
from n doped semicond. electron migrate towared p doped layer due to attraction (p means holes also migrate but has poor mobiliy.)
however after certain electron migration the p side becomes more negatively charged hence migration of electron reduces and after that migration may totally stop.
Such equillibrium forms so called depletion region and the voltage of the charges gives rise to depletion voltage.
such voltage depends upon the type of semiconductor.
In case of Silicon is of the order of 0.6 to 0.7 volts.
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