Charge carrier (physics)
In semiconductor physics , charge carriers are understood to be freely movable electrons and defect electrons . They enable charge transport, i.e. electric current . A defect electron is an electron that is missing from the entirety of the valence electrons; it acts like a moving positive elementary charge. Defect electrons are therefore also simply referred to as “holes”.
Particles that exist with a negative and a positive charge can occur as carrier pairs .
- Charge carriers - Lexicon of Physics. Retrieved July 15, 2016 .