P-Type Semiconductors

P-Type Semiconductors – revision notes

P-type semiconductors are obtained by adding trivalent impurities (Boron, Gallium, Indium, Aluminum) to a pure semiconductor. The three valence electrons of the impurity atom form covalent bonds with neighboring semiconductor atoms and the fourth covalent bond has a vacancy. This gives rise to a hole in the semiconductor. Thus the addition of trivalent impurity atom […]

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