The discussion centers on the behavior of electrons and holes in semiconductor materials, specifically in p-n junctions. When electrons from the n-region diffuse to the p-region, they recombine with holes, resulting in a net charge shift where the n-region becomes positively charged and the p-region becomes negatively charged. The concept of holes is clarified as positions in the lattice without charge, rather than being inherently positively charged. Recombination is defined as the process where electrons and holes pair together, leading to changes in charge distribution within the semiconductor.
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HyDraZin3 said:When electrons from N region diffuse to P region, the electrons combine with holes to form a -ve negative ion leaving behind a +ve ion in P region.So, my doubt is how the holes accept the electrons and get a negative charge because as the holes are positively charged, when they accept the electron which is negatively charged the net charge should be neutral.
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Imagine a perfect, neutral lattice of silicon. Now, at a single position, remove one proton from a nucleus and one electron. It is still neutral, as you removed one positive charge and one negative charge. The silicon atom became an aluminium atom, and as you removed one electron there is a position where a new electron from somewhere else can fit in.HyDraZin3 said:can you tell me the reason why holes do not have a positive charge on induced doping?