When a pentavalent impurity is added to a pure ... - JAMB Physics 2009 Question
When a pentavalent impurity is added to a pure semiconductor, it becomes
A
a p-type semiconductor
B
an n-type semiconductor
C
an insulator
D
an intrinsic semi-conductor
correct option: b
When a pentavalent (5 outer electron)atom is added to a pure semiconductor, there is an extra electrons which does not take part in the covalent bonding resulting in an n-type semiconductor.
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