Question

on an atomic scale what happens when silicon is doped with phosphorous impurity atoms

Answer 1

Explanation:

In contrast to the free electron due to doping with phosphorus, the 3-valent dopant effect is exactly the opposite. The 3-valent dopants can catch an additional outer electron, thus leaving a hole in the valence band of silicon atoms. ... Due to positive holes these semiconductors are called p-conductive or p-doped.

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