For quite some time I haven't been able to convince myself how reverse bias works using conventional explanations that involve words like 'minority carriers', 'majority carriers' etc. which do not make much sense to me.
Consider the image below: Now I am an electron in that depletion region. I was not here initially, I was in the wire (free-moving electron of a copper atom) or perhaps battery (...of an ion?) but now I have been pushed here.
I feel attracted to the positive charges (which are for example phosphorous atoms with four valence electrons, hence the + charge) at the same time I also feel the repulsion from the negative terminal of the battery. I feel tempted (as well as all my electron friends) to move across the border and happily combine with the phosphorous ions, which is not happening. So what stops me there??
I am actually expecting to see answers that require knowledge about solid state physics particularly band gap and band theory, fermi-dirac stats etc., which I do not know enough about and need to get a lot more reading. Can anyone please confirm this so I can move on feeling a little more assured and come back to this after I know enough about solid state physics.
UPDATE: from the same question on physics stack exchange It could be probably due to that, somehow, my friends and I are bound to those impurity trivalent ions i.e. we are immobile in this context. But somehow forward biasing makes us mobile again.