Question

To make a p-type semiconductor, an intrinsic semiconductor is doped with __________.

• A. Gallium or indium
• B. Arsenic or phosphorus
• C. Aluminium or boron
• D. Both (1) and (3)

Answer 1

The correct option is D Both (1) and (3)

To make a p-type semiconductor, an intrinsic semiconductor is doped with an acceptor impurity i.e. an impurity which has 3 valence electrons in its outer orbit. Out of the options available, the trivalent atoms are gallium, indium, aluminum and Boron. So the answer is (d).