Classify each of the following as being either a p-type or an n-type semiconductor
a. Ge doped with In
b. `B` doped with `Si`

Explanation

(i) Ge is Group 14 element and In is Group 13 element. Hence, an electron deficit hole is created and therefore, it is p-type
(ii) B is Group 13 element and Si is Group 14 element. there will be a free electron. Hence, it is n- type.