The explanation of the majority and minority charge carriers in the volume III is not enough or simply incomplete.The explanation of the depletion region is not synchronizing with the quantum mechanics which you have explained earlier.
Relevant Sections:The explanation of the majority and minority charge carriers in the volume III is not enough or simply incomplete.The explanation of the depletion region is not synchronizing with the quantum mechanics which you have explained earlier.
The two ends of the material are doped with holes or electrons such that they have a net positive (holes) or negative (charge). A process of diffusion occurs across the junction where electrons are attracted into the positive p-doped side and holes are attracted to negative n-doped side. As the electrons (negative) are attracted into the p-side there accumulates a surplus of electrons resulting a net localised negative charge on the p-side. Conversely, as the holes (positive) are attracted into the n-side there accumulates a surplus of holes resulting a net localised positive charge on the n-side. (I have ignored the process of recombination at the junction in order to illustrate the above point).why the charges in the depletion region are localized?
By the process of diffusing from one place to another the charge becomes local to the place it diffuses to - local in this sense meaning "in the physical vicinity of".Yes but iwant to know the reason that why these charges become localized when they diffuse through the junction into opposite region.
I have also tried to clarify my points by pointing out that charge accumulates (i.e. it builds up) to provide the localised charge distribution observed.Yes but iwant to know the reason that why these charges become localized when they diffuse through the junction into opposite region.
No he is not.Yes it is clear that when a man (charge) moves (diffuse) from town A to town B he becomes local to the town be.In town B,is he able to migrate to town A again?If not,then why?
Electrons (and holes which are merely the absence of an electron) are the charge carriers, therefore the atomic details of semiconductor lattice are of less importance in understanding how the PN junction works.While all the majority charge carriers namely holes and electrons are present in atoms,where is the explanation about the atoms of crystal lattice.
There is a process of recombination creating a region where there is no mobile charge and an electric-potential across its width.Also explain what has happened to the atoms in the depletion region.