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13 cards from this deck
Between conductors and insulators
Silicon
Valence band, conduction band, band gap
≈0\approx 0≈0 eV (overlapping bands)
≈0.1−4\approx 0.1-4≈0.1−4 eV
>4> 4>4 eV
Increases conductivity significantly
Adding tiny amounts of impurities
Extra electrons from donor impurities
Holes from acceptor impurities
Phosphorus (P) or arsenic (As)
Boron (B)
99.9999999% pure
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