The energy band diagrams for three semiconductor samples of silicon are as shown. We can then assert that

Options

A. Sample `X` is undoped while samples `Y` and `Z` have been doped with a third group and a fifth group impurity respectively
B. sample `X` is undoped while both samples `Y` and `Z` have been doped with a fifth grop impurity
C. sample `X` has been doped with equal amounts of third and fifth group impurities while samples `Y` and `Z` are undoped
D. sample `X` is undoped while samples `Y` and `Z` have been doped with a fifth group and a third impurity respectively

Answer

D

Explanation

NA