Question

Classify each of the following as being either a p-type or n–type semiconductor.
1. Ge doped with In
2. B doped with Si

Answer 1

1. Ge is group 14 element and In is group 13 element. Hence an electron deficient hole is created and therefore, it is p–type.
2. B is group 13 elements and Si is group 14 elements, there will be a free electron. Hence, it is n-type