1. The problem statement, all variables and given/known data For a forward biased P plus N abrupt junction diode, Lp = 1 micrometer, and at x = xn (x' = 0), the ratio of the hole current to the electron current, Ip/In, is 100 in the steady state. Determine Ip/In at x' = 1 micrometer. 2. Relevant equations Jn = In/A Jp = Ip/A Jp(x') = qDpp0n/Lp[exp(qVa/KT) - 1]exp(-x'/Lp) Jn(-xp) = qDnnop/Ln[exp(qVa/KT) - 1] 3. The attempt at a solution The attempt to the solution was to use the relationship of the second equation which is the hole current density equation. I have manipulated the equation to solve for the hole current which is Ip = AJp. This is where I got stuck and I could not finish the problem.