Semiconductors

1. Intrinsic Semiconductors
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2. • Does not have any kind of
impurities.
Intrinsic Semiconductors
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3. • Does not have any kind of impurities.
• Behaves as an Insulator at 0k.
Intrinsic Semiconductors
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4. • Does not have any kind of impurities.
• Behaves as an Insulator at 0k.
• Behaves as a Conductor at higher
temperature.
Intrinsic Semiconductors
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5. • Does not have any kind of impurities.
• Behaves as an Insulator at 0k.
• Behaves as a Conductor at higher temperature.
• Eg - Germanium and Silicon (4th group
elements) - possess diamond cubic crystalline
structure.
Intrinsic Semiconductors
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6. • Does not have any kind of impurities.
• Behaves as an Insulator at 0k.
• Behaves as a Conductor at higher temperature.
• Eg - Germanium and Silicon (4th group elements) -
possess diamond cubic crystalline structure.
Intrinsic Semiconductors
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7. Si
Si
Si
Si
Si
Intrinsic Semiconductors
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8. Si
Si
Si
Si
Si
Valence orbit
Intrinsic Semiconductors
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9. Si
Si
Si
Si
Si
Valence Orbit
Covalent bonds
Intrinsic Semiconductors
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10. E
Ev
Valence band
Ec
Conduction band
Ec
Electron
energy
Distance
Intrinsic Semiconductors
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11. E
Ef
Ev
Valence band
Ec
Conduction band
Ec
Electron
energy
Distance
Fermi energy level
Intrinsic Semiconductors
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12. E
Ef
Ev
Valence band
Ec
Conduction band
Ec
Electron
energy
Distance
Fermi energy level
Energy
Intrinsic Semiconductors
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13. E
Ef
Ev
Valence band
Ec
Conduction band
Ec
Electron
energy
Distance
KE of
Electron
= E - Ec
KE of Hole
=
Ev - E
Fermi energy level
Intrinsic Semiconductors
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