Question: a ) Draw band structures of ( n ) - type, ( p ) - type, and intrinsic semiconductors with annotations.

a) Draw band structures of \( n \)-type, \( p \)-type, and intrinsic semiconductors with annotations.
b) Among three different semiconductors, how can you characterize the type of semiconductor?
c) Explain band structure at Fermi level. Is there any difference between them?
d) If you are considering light emitting devices using semiconductors, how can you change the emitted color of LED?
a ) Draw band structures of \ ( n \ ) - type, \ (

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