Module 6 : PHYSICS OF SEMICONDUCTOR DEVICES
Lecture 33 : Electrons and Holes
  Thus, the vacancy in the valence band behaves like a particle of positive effective mass and positive charge as far as its behaviour in an electric field is concerned. This vacancy is known as a hole . In a semiconductor, the conduction takes place by motion of electrons in the conduction band and that of holes in the valence band.
 
 
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