Holes in Semiconductors
Category : JEE Main & Advanced
(1) When an electron is removed from a covalent bond, it leaves a vacancy behind. An electron from a neighbouring atom can move into this vacancy, leaving the neighbour with a vacancy. In this way the vacancy formed is called hole (or cotter), and can travel through the material and serve as an additional current carriers.
(2) A hole is considered as a seat of positive charge, having magnitude of charge equal to that of an electron.
(3) Holes acts as virtual charge, although there is no physical charge on it.
(4) Effective mass of hole is more than electron.
(5) Mobility of hole is less than electron.
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