adj. Made of material, usually a semiconductor such as silicon, that has been doped with impurities so that it has an excess of electron holes. [p(ositive)-type, from the behavior of electron holes as carriers of positive charge.]

What does p-type stand for?

Because an acceptor donates excess holes, which are considered to be positively charged, a semiconductor that has been doped with an acceptor is called a p-type semiconductor; "p" stands for positive. Notice that the material as a whole remains electrically neutral.

What is meant by p-type materials?

A p-type semiconductor is an intrinsic semiconductor doped with boron (B) or indium (In). Silicon of Group IV has four valence electrons and boron of Group III has three valence electrons.