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- Conduction of electricity in intrinsic semiconductor, is caused by. Option: 1 Flow of electrons in Conduction band only
Conduction of electricity in intrinsic semiconductor, is caused by.
Flow of electrons in Conduction band only
Flow of holes in Valence band only
Flow of electrons in conduction band and flow of holes in valence band both.
None of these
Answers (1)
As we have learned
Intrinsic semi conductor -
It is pure semiconductor
e.g. pure Ge, or Pure Si
- wherein
low conductivity
ne = nh
At room temprature, a few covalent bonds are broken due to thermal agitation. Thus, some of the valence electrons become free and shift to valence band, leaving a space in the valence band of intrinsic semiconductor's crystals. This electron deficient space is known as hole and it acts like a positively charged particle.
When an external electric field is applied across the semi conductor, the electrons present in the conduction band move opposite the direction of electric field while the positive holes in the valence bond move in the direction of external electric field. The movement of the electrons and holes cause the conduction of electricity in intrinsic semiconductors.
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