[SOLVED] holes in pure semiconductor

[nitin.maurya1]

in a pure semiconductor holes exist in which band.
valence or conduction band ?

 

[haykp]

Yes in pure silicon holes exists, these holes appear because of free electrons which broke the connection with their atome, and become free. In other word they mode from valence region to conduction region. In place of these electrons the free place is being formed, which is called hole. Which is being treated as separate charge carrier in theory.

And holes can exists only in valence band.