A p-type Si semiconductor is made by doping an average of one dopant atom per 5 × 10^7 silicon atoms. If the number density of silicon atoms in the specimen is 5 × 10^28 atoms m−3, find the number of | Shaalaa.com
A p-type Si semiconductor is made by doping an average of one dopant atom per 5 × 10^7 silicon atoms. If the number density of silicon atoms in the specimen is 5 × 10^28 atoms m−3, find the number of | Shaalaa.com
4 months ago
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A p-type Si semiconductor is made by doping an average of one d... | Filo
A p-type Si semiconductor is made by doping an average of one d... | Filo
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Start with intrinsic semiconductor – pure silicon (Si) or germanium (Ge). Add pentavalent dopant atoms: Examples: Phosphorus (P), Arsenic (As), Antimony (Sb) Each dopant atom has 5 valence electrons. Effect of doping: 4 electrons of the dopant form covalent bonds with neighboring Si atoms. The 5th electron is loosely bound → easily becomes a free electron. Result: Majority carriers: Electrons Minority carriers: Holes
0:06
Start with intrinsic semiconductor – pure silicon (Si) or germanium (Ge). Add pentavalent dopant atoms: Examples: Phosphorus (P), Arsenic (As), Antimony (Sb) Each dopant atom has 5 valence electrons. Effect of doping: 4 electrons of the dopant form covalent bonds with neighboring Si atoms. The 5th electron is loosely bound → easily becomes a free electron. Result: Majority carriers: Electrons Minority carriers: Holes
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