Question

Which type of semi-conductor is formed when a trivalent impurity is dopped in a pure semiconductor?

Answer 1

As opposed to n-type semiconductors, p-type semiconductors have a larger hole concentration than electron concentration. The term p-type refers to the positive charge of the hole. In p-type semiconductors, holes are the majority carriers and electrons are the minority carriers. P-type semiconductors are created by addition of trivalent impurities such as boron, aluminum or gallium to an intrinsic semiconductor creates deficiencies of valence electrons,called "holes".