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Which diode has no depletion region?
Schottky diode
Since they are constructed using a metal compound on one side of their junction and doped silicon on the other side, the Schottky diode therefore has no depletion layer and are classed as unipolar devices unlike typical pn-junction diodes which are bipolar devices.
Why depletion region in Schottky contact is smaller than the P-N junction?
1. Schottky interface(contact) is “smaller” than the p-n interface(contact) because the Schottky contact is 1/2 junction (only one majority carriers depletion region), while p-n junction is a full junction (two depletion regions formed by the respective majority carriers).
How is depletion region developed in a Schottky diode?
Here diffusion thereby development of depletion is caused by the movement of majority carriers. Schottky diode has a metal and N-type semiconductors junction. In both metal and N-type semiconductor majority carriers are electrons.
How is reverse breakdown voltage of Schottky diode different from p-n junction diode?
The reverse breakdown voltage of a schottky diode is very small as compared to the p-n junction diode. In schottky diode, the depletion region is absent or negligible, whereas in p-n junction diode the depletion region is present.
Why does a Schottky diode not have a recovery time?
Schottky diodes do not have a recovery time, because Schottky diode doesn’t have a depletion region at the junction. Reverse leakage current: Current conducted from a semiconductor device in reverse bias is reverse leakage current. In the Schottky diode, increasing the temperature will significantly increase the reverse leakage current.
Why are germanium diodes used instead of Schottky diodes?
But germanium diodes are rarely used because the switching speed of germanium diodes is very low as compared to the schottky diodes. The symbol of schottky diode is shown in the below figure. In schottky diode, the metal acts as the anode and n-type semiconductor acts as the cathode.