Sketch and label the charge density (x), the electric fi eld E(x), and the electrostatic potential (x) for a pn junction of the type of if the p-side doping is kept fi xed at NA 5 1016/cm3 but the...

Sketch and label the charge density (x), the electric fi eld E(x), and the electrostatic potential (x) for a pn junction of the type of if the p-side doping is kept fi xed at NA 5 1016/cm3 but the n-side doping is progressively increased as follows: (a) ND 5 1016/cm3 (symmetric doping), (b) ND 5 4 3 1016/cm3 (asymmetric doping), and (c) ND 5 1017/cm3 (even more asymmetry). Compare the three cases, comment.