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

 

 

 

 
 
 
 
 

Answers (1)
S safeer

The energy band diagram of n-type, Semiconductor
at temperature T>0 K (first figure on the left side)

The energy band diagram of p-type, Semiconductor
at temperature T>0 K (second figure on right)


 

  • The role of Acceptor and Donor energy level:-
    The Donor energy level decreases the energy gap between the conduction band and the valence band.
    As a result, the conduction band will get more electrons from the donor impurity with a small supply of energy, whereas p-type Semiconductor the holes from acceptor level sinks down into the valence band.

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