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where is fermi energy?

P

PZ

Jan 1, 1970
0
"An n-type sample of silicon has a uniform density Nd= 10e16
atomes cm(-3) of arsenic. Find out the temperature at which half the
impurity atoms are ionized. Assume that all mobile electrons and holes
come from dopant impurities".

this is the question.

I was told the fermi level is about Ed, which is 0.05 below Ec. why is
fermy at Ed?


thanks
 
P

Pooh Bear

Jan 1, 1970
0
PZ said:
"An n-type sample of silicon has a uniform density Nd= 10e16
atomes cm(-3) of arsenic. Find out the temperature at which half the
impurity atoms are ionized. Assume that all mobile electrons and holes
come from dopant impurities".

this is the question.

I was told the fermi level is about Ed, which is 0.05 below Ec. why is
fermy at Ed?

Homework was it ?

Graham
 
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