13 December 2017

Hole Current

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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