(a) In your own words, explain how donor impurities in
Chapter 18, Problem 18.26(choose chapter or problem)
(a) In your own words, explain how donor impurities in semiconductors give rise to free electrons in numbers in excess of those generated by valence bandconduction band excitations. (b) Also, explain how acceptor impurities give rise to holes in numbers in excess of those generated by valence bandconduction band excitations.
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