Q11B.11 Suppose we can adjust a semiconductor's band
gap from 1.0 eV to 2.0 eV by changing a certain impurity's
concentration. (a) Other things being equal, does the semi-conductor become more conductive or less conductive as we do this? (b) By about what factor at room temperature
(where kBT≈ 0.026 eV)? Explain your reasoning. (Hint: How much more or less likely is it for an energy level in
the conduction band to be occupied by an electron?)
