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Schottky Diode

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image© Wikipedia


Schottky diode is a semiconductor diode which has low forward voltage drop and a very fast switching speed. The junction between an aluminum and n-type semiconductor constitutes a diode, known as Schottky diodes. The aluminum n-type Schottky diode has a cut in voltage of about 0.35 V. It is also known as Schottky barrier diode and hot-barrier diode. 

When a Schottky diode is forward biased, that is positive terminal of a battery is connected to the metal and the negative terminal to semiconductor, current across the junction due to flow of electrons from semiconductor to the metal. Electrons thus entering the metal cannot be distinguished from the plentiful electrons already present in the metal and hence these do not constitute minority carriers. Therefore, when the junction voltage is reversed the problem of removal of the excess minority charge does not exist. Hence Schottky diode exhibit negligible storage time.  

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