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Lec2 Introduction to Semiconductors
This document provides an overview of semiconductors, comparing silicon and germanium, discussing their covalent bonds and energy bands. It describes how electrons and holes allow current in semiconductors, and defines intrinsic and extrinsic semiconductors, with intrinsic referring to pure silicon and germanium and extrinsic referring to doping to create N-type or P-type materials. It further explains that N-type materials have electrons as majority carriers and holes as minority carriers, while P-type is the opposite, before discussing how a PN junction diode is formed and only conducts current in one direction.
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Lec2 Introduction to Semiconductors
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- 4. 4 COMPARISSON OF Siand C
- 5. 5 Silicon and Germanium •Germanium is unstable at high temperature
- 6. 6 Covalent bond ofSi and Ge
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- 9. 9 Electrons And HoleConduction
- 10. 10 Electrons And HoleConduction
- 11. 11 Electrons And HoleConduction
- 12. 12 Intrinsic and Extrinsicsemiconductors Intrinsic • Silicon and Germanium in its neutral form Extrinsic • Adding impurities using doping in silicon • Makes it either N-type or P- type
- 13. 13 Intrinsic and Extrinsicsemiconductors
- 14. 14 Intrinsic and Extrinsicsemiconductors N- type • Electrons in majority carriers • Holes in minority carriers
- 15. 15 Intrinsic and Extrinsicsemiconductors P- type • Electrons in minority carriers • Holes in majority carriers
- 16. 16 Diode • PN junctionis formed between N-type and P-type portion • Diode conduct in only one Direction.
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