Drive the equation of built in potential barrier under zero biased condition. If an abrupt PN junction has dopant concentration of Na=2*10^16 cm^-3 and Nd = 2*10^15 cm^-3 at T=300K calculate Vbi, W at Vr=0v and Vr=8v. also calculate the electric field in space charge region at Vr=0v and Vr=8v.
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