Question

To prepare n-type semiconductor the impurity to be added to silicon should have the following number of valence electrons:

• A. $2$
• B. $3$
• C. $4$
• D. $5$

Answer 1

The correct option is D $5$

To prepare n-type semiconductor the impurity to be added to silicon should have 5 valence electrons.

In n-type semiconductors, electrons are the majority carriers and holes are the minority carriers. N-type semiconductors are created by doping an intrinsic semiconductor with donor impurities.