What is hole
current?
- The missing electron in the crystal structure is called as hole.
- The conduction of current due to missing electrons is called as hole current.
- The covalent bonds in the semi conductor material breaks resulting some free electrons are generated.
- The free electrons generate current under electrical field. When a covalent bond is broken due to thermal energy, electron moves.
- The hole is missing electron in the covalent bond.
- As an electron missing in atomic structure, it has positive charge. Therefore we can say that hole has positive charge.
- Every missing electron leaves behind valence or hole.
- Therefore the electrical field creates electron – hole pairs.
- The hole current is due to movement of electron from one covalent bond to another covalent bond.
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