1. The problem statement, all variables and given/known data When pn junction is reverse biased, the depletion layer grows and no current flows except for the little reverse current. 2. Relevant equations But acceptor aions have one electron that they can spare if you give it a little energy, and that electron could be attracted from the field of the donnor ions. But why that kinda doesnt happen? 3. The attempt at a solution Thats my statement: even though it appears that atoms from the N region have lost an electron and now in that place can go another, that electron exchange between the semiconductors have more to do with The fact that the electrons doesnt simply move to atoms with umcompensated charge (wich they do) they move to atoms that need an electron to complete theyr bonds with other atoms. And when electrons flow to the p region there are many of those atoms. But the donnor ions have 4 more vallence electrons wich is more than enough to complete theyr bonds with the Si atoms. And thats why i think current doesnt flow. Becouse the holes in the P region have more '' weight'' on these free electrons than the uncompensared +charge on the N region. Can someone correct me if im wrong?