P-type Semiconductors Explained

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Dr. Bedard(Ph.D.) explains P-type Semiconductors. P-type Semiconductors are doped with elements from Group 13, also known as 3A, of the periodic table such as boron (B), aluminum (Al), or gallium (Ga). These elements have three valence electrons, one less than silicon, which has four.
This creates a "hole" or absence of an electron in the valence band, which acts as a positive charge carrier. Electrons from neighboring silicon atoms can move to fill this hole, effectively allowing the hole to move through the material and contribute to electrical conductivity. In P-type semiconductors, holes are the majority carriers, moving through the valence band as electrons fill the holes.



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