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

1. Ge is group 14 element and in is group 13 element Hence, an electron deficient hole is created and therefore, it is a p-type semiconductor.
2. B is group 13 element and Si is group 14element. There will be a free electron, so, it is an n-type semiconductor.