The PN junction diode is one of the semiconductor device with two semiconductor materials in physical contact, one is p-type (excess of holes0 and other is N-type (excess of electrons).
The important characteristic of a PN junction is its ability to allow the flow of current in only one direction.
TYPES OF SEMICONDUCTORS:
Semiconductors are classified as
- intrinsic semiconductors (pure)
- extrinsic semiconductors (impure)
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