Consider a Si sample of length L. The diffusion coefficient for electrons is 25cm2 /s and electron lifetime is 0.01 µs. An excess electron concentration is maintained at x=0 and x=L. The excess concentrations are: Δn(x=0)=2x1018 cm-3 ; Δn(x=L)= ─1x1014 cm-3 . Calculate and plot the excess electron distribution from x=0 to x= L. Do the calculations for the following values: L= 10 µm and 0.5 µm.