CBSE Class 12-science Answered
What exactly is an electron hole pair? Why is it a pair?
Asked by Anirudh | 18 Aug, 2017, 03:37: PM
Expert Answer
1) In a semiconductor, free moving electrons jump from valence band to conduction band with an increase in temperature.
2) When these electrons jump, they leave behind a virtual positive space which is called a "HOLE".
3) So, the jumping of electron is simultaneously associated with creation of hole. This is the electron hole pair in semiconductors. Since, it is a simultaneous process and both electrons and holes exist, they are called a pair.
Answered by Romal Bhansali | 19 Aug, 2017, 06:59: PM
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