Question

To prepare a n- type semiconductor the element (impurity agent) to be added

with Ge is​

Answer 1

Answer:

Adding a pentavalent impurity will lead to greater no. of free electrons than no. of holes and will result in n-type semiconductor.

Answer 2

Answer:

arsenic

In n-type semiconductors, the extra band named as the donor band is added in the between the conduction and valence band. This makes it easy for the excitation of an electron from the donor band to the conduction band. Thus the arsenic is doped to form n-type semiconductor. Hence, (B) is the correct option.

Explanation:

Germanium can be made an n-type semiconductor by doping it with pentavalent impurities, like phosphorus (P), arsenic (As), or antimony (Sb).