What are extrinsic semiconductor?

What are intrinsic semiconductor?

When impurity (atom) is added to an intrinsic semiconductor , then it becomes extrinsic semiconductors . What is the above process called ? b. What is the advantage of doing so ? c. Distinguish between intrinsic semiconductor and extrinsic semiconductor.

Distinguish between intrinsic and extrinsic semiconductors.

Lets n_p and n_e be the number of holes and conduction electrons in an extrinsic semiconductor.