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Q#1
Semiconductor Physics
GATE EC 2024
NAT
+2 marks
-0 marks
A non-degenerate n-type semiconductor has 
neutral dopant atoms. Its Fermi level is located at 
below the conduction band 
and the donor energy level 
has a degeneracy of 2. Assuming the thermal voltage to be 
. The difference between 
and 
(in 
, rounded off to two decimal places) is 
__________.
Explanation:
neutral donor atoms/dopant atoms means 
donor atoms are ionized. Concentration of electrons occupying the donor level is given as
and 
where 
is ionized donor atoms concentration.
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