question

draw the energy band diagram of(i) n-type,and  (ii)p-type semiconductors at temperature t>0 k in the case of n-type si-semiconductor, the donor energy level is slightly below the bottom of conduction band whereas in p-type semiconductor.
the acceptor energy level is slightly above the top of valence band.
explain, giving examples, what role do these energy levels play in conduction and valence bands

 

 

 

 

 

 

 

 

572