A pn-junction is uniformly doped and has dopant concentration of NA = 4 x10^16 cm-3 in the p-region at 300K. AT zero bias, 20% of the total space charge region (W) is extended in the p-region.
Calculate Vbi, ND, W, xn and xp. Given that ni = 1.8 x 10^6 cm-3 and e=1.16 x 10^-12 F/cm.