Intrinsic and Extrinsic Semiconductors PDF
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Summary
This document provides a brief overview of intrinsic and extrinsic semiconductors, the concept of electron-hole conduction, doping, and different doping methods. It's relevant to undergraduate-level study in physics and material science.
Full Transcript
Intrinsic Semiconductors ✓ Concept of electron-hole conduction ✓ Inborn/ basic/ natural/ pure/ without any impurity ✓ Eg: Pure Si ✓ Pure Ge Current in S.C is due to: ✓ Thermally generated free electron ✓ Holes Extrinsic Semiconductor ✓ p type and n type based on impuri...
Intrinsic Semiconductors ✓ Concept of electron-hole conduction ✓ Inborn/ basic/ natural/ pure/ without any impurity ✓ Eg: Pure Si ✓ Pure Ge Current in S.C is due to: ✓ Thermally generated free electron ✓ Holes Extrinsic Semiconductor ✓ p type and n type based on impurity added Doping ✓ The process of adding impurities (intensionally) is called doping ✓ The impurity added is called ‘dopant’. ✓ The impure SC thus obtained is doped SC. Ways of Doping: ✓ Heating the pure SC in atmosphere of impurity atoms so that impurity atoms diffuses into the pure crystal. ✓ Bombarding the pure crystal with impurity atoms.
