kirchhoff's law

  1. U

    PN junction seems to violate Kirchhoff law? Where am I wrong?

    Hi everyone, I am studying the PN junction and I have learnt that in open circuit condition it has a built-in voltage (here called B) determined by the difference in fermi level of its n-doped and p-doped parts. Then we can apply, for example, a forward bias, this will lower the voltage...