Derivation of J-V relationship for p-n junction Steps: a) Write the excess electron concentration on the p-side as a function of position b) Write the excess hole concentration on the n-side as a function of position c) Calculate the electron current at the edge of the depletion region on the p-side d) Calculate the hole current at the edge of the depletion region on the n-side e) Add to get total J-V curve f) Compare with the standard expression. What is J_o?