The negatively charged acceptor atoms and the positively charged donor atoms are the circled minuses and pluses, right? But what about the red and blue lines? I thought they show the free electrons and holes, which can move?
I've been reading various explanations for a number of hours, and I'm still completely confused. I'll refer to an explanation from Wikipedia, but do point me to a better one if you know one.
What does the depletion zone have to do with current flow? Looking at Figure A (see link above), there...