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Metal -Semiconductor and Semiconductor Hetero-Junctions

Metal-Semiconductor Junctions

Any semiconductor devices needs to be connected to outside world. This contact will be either Ohmic or Schottky.

Ohmic contact

Schottky contact

Semiconductor Hetero-junction

Semiconductor hetero-junction is a structure formed between two semiconductor materials of different band gaps. A potential well is created at the interface works on confining the electron in one direction.