Start with the Fermi function:

(i) Plot it at 0 K, 100 K, 300 K, 900 K, and 2700 K

(ii) Assume we are using Si with the density of states in the conduction

band and valence band as we wrote down in class (reference the slides for

the equation). Make 1 plot with the electron concentration on the left y

axis, the hole concentration on the right y axis, and the Fermi level as the x

axis. Calculate this using the full equation for electrons and holes, not the

effective density of states approximation you just derived. Make another

plot of the same data, but the Y axis should be log scale, not linear scale.