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Semiconductors with n<<Nc and p<<Nv are non-degenerate s/c

Semiconductors with n>>Nc and p>>Nv are degenerate s/c

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Degenerate semiconductors have a high concentration of charge carriers due to doping, while non-degenerate semiconductors have a low concentration. Degenerate semiconductors exhibit metallic-like conductivity and Fermi level is inside the conduction or valence band, while non-degenerate semiconductors have a well-defined band gap and behave as insulators at low temperatures.

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Q: What are the differences between degenerate and non-degenerate semiconductors?
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