In an intrinsic semiconductor, the number of free electrons
Right Answer is:
Equals the number of holes
- A semiconductor in an extremely pure form is known as an intrinsic semiconductor.
- It is a semiconductor in which electrons and holes are solely created by thermal excitation.
When the temperature of an intrinsic semiconductor is raised, the electrons reaching the conduction band due to thermal excitation leave an equal number of vacancies or holes in the valence band and so in an intrinsic semiconductor the number of free electrons is always equal to the number of holes.
Thermal energy continues to produce new electron-hole pairs whereas other electron-hole pairs disappear as a result of the recombination of holes and free electrons.