Question

In the energy band diagram of a material shown below, the open circles and filled circles denote holes and electrons respectively. The material is:

• A. an n-type semiconductor
• B. a p-type semiconductor
• C. an insulator
• D. a metal

Answer 1

The correct option is B a p-type semiconductor

It is a p-type semiconductor as the electrons from valence bond will jump to acceptor energy levels which is shown in the figure, thus leaving holes in valence bond. This way no. of holes>> no. of electron which is clearly seen the diagram. Hence a p-type semiconductor.