Question

In $n$ -type semiconductor when all donor states are filled, then the net charge density in the donor states becomes

• A. $1$
• B. $<1$
• C. $<1,$ but not zero
• D. zero

Answer 1

The correct option is C $<1,$ but not zero

The major charge carriers in a $\text{n -}$type semiconductor are electrons. When all donor states are filled, then the net charge density in the donor states becomes less than $1$ because of all the negative charges,

But, it can not be equal to zero.