Question

for an extrinsic semiconductor , the valency of the donor iimpurity is a. 2 b. 1 c. 4 d. 5 ​

Answer 1

Answer:

d

Explanation:

Pentavalent impurities such as phosphorus, arsenic, antimony etc are called donor impurity. let us consider, pentavalent impurity phosphorus is added to silicon as shown in below figure. phosphorus atom has 5 valence electrons