Classify each of the following as being either a p-type or an n-type semi-conductor. Give reason-
Classify each of the following as being either a p-type or an n-type semi-conductor. Give reason-
(a) Si dopped with In (b) Si dopped with P
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(a) p-type, because In has 3 valence electrons. Holes are produced which can move through the crystal like positive charge.
(b) n-type, because P has 5 valence electrons. The fifth electron becomes delocalised and is free contribute to electrical conduction.
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