How to add a corresponding statement to the code, to display the position of Fermi level in the structure?
Tne Fermi level is formally defined in Equilibrium, where there is no bias.
However, you can still plot the so-called quasi-Fermi levels, using their definition
Efn = Ei + kB.T ln (n/ni),
Efp = Ei - kB.T ln (p/ni)
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