Hi,
I have the following graphs in my diodes lecture, can someone explain or point me to a tutorial that explains the graphs and the symbols in each of the 3 images below. If you can start by explaining what Ec, Ef, and Ev mean and take it from there.


UNBIASED JUNCTION


FORWARD BIASED JUNCTION



REVERSE BIASED JUNCTION

 

You can start googling "PN Junction Energy Band Diagrams". Ec: conduction band, Ef: Fermi energy, Ev: valence band.

 

Thanks for that!