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What is p-n junction diode ? Define de...

What is p-n junction diode ? Define depletion layer.

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Whan an intrisic semiconductor crystal is grown with one side doped with trivalent element and on the other side doped with pentavalent element, a junction is formed in the crystal.It is called p-n junction diode.
A thin narrow region is formed on either side of the p-n junction,which is free from cahrge carriers is called depletion layer.
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