Explanation

The electrical conduction generated by the movement of holes in a solid. The electron state near the top of the band in a solid is called a hole, and this band is an incomplete band that can transport current. From the behavior of the current, it seems that the carrier is positively charged. Therefore, it can be regarded as a quasi particle, and various mechanisms of their scattering are discussed, just as electrons are. The Hall effect can be used to judge whether the conduction of materials is caused by the movement of electrons or holes. Semiconductors with holes as the majority carriers are called P-type semiconductors, which are formed by doping acceptor impurities (lower priced impurities). The energy level of the acceptor are located near the top of the valence band in the band gap. They can accommodate the electrons excited by the valence band, leaving holes in the valence band. hole conduction also exists in some high valence metals (such as Fe, Cr).

Classification