To determine the type of semiconductor represented by the given band structure, we need to analyze the energy band diagram and the type of doping used.

In the diagram above, there is an additional energy level close to the valence band, which signifies the presence of an acceptor level. This is typical for a p-type semiconductor.

Explanation

1. A p-type semiconductor is created by doping an intrinsic semiconductor (such as Si) with a trivalent impurity (such as Boron, B). This introduces acceptor energy levels just above the valence band.
2. An n-type semiconductor is formed by doping with pentavalent impurities (such as Phosphorus, P), which introduce donor energy levels just below the conduction band.
3. The diagram shows that the additional level is closer to the valence band, typical for a p-type semiconductor formed by doping silicon (Si) with boron (B).

Conclusion

Given the position of the additional energy level, the correct answer is p-type semiconductor formed by doping Si with B.