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What do you mean by the tem ‘FREEZE-OUT’?
- a)All the electrons are frozen at room temperature
- b)None of the electrons are thermally elevated to the conduction band
- c)All the electrons are in the conduction band
- d)All the holes are in the valence band
Correct answer is option 'B'. Can you explain this answer?
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What do you mean by the tem ‘FREEZE-OUT’?a)All the electro...
Freeze out means none of the electrons are transmitted to the conduction band.
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What do you mean by the tem ‘FREEZE-OUT’?a)All the electro...
FREEZE-OUT
Explanation:
When we talk about "freeze-out" in the context of semiconductors, we are referring to the situation where none of the electrons are thermally elevated to the conduction band. This typically occurs at very low temperatures.
Key Points:
- In a semiconductor material, there are both electrons in the conduction band and holes in the valence band.
- At room temperature, thermal energy can excite some electrons from the valence band to the conduction band, creating electron-hole pairs which contribute to the conductivity of the material.
- However, at very low temperatures, the thermal energy is insufficient to promote electrons to the conduction band. This results in a "freeze-out" of the electrons, as none of them are thermally elevated to the conduction band.
- In this state, the semiconductor material behaves more like an insulator, with very low conductivity due to the absence of free charge carriers in the conduction band.
In conclusion, the term "freeze-out" refers to the condition in a semiconductor where none of the electrons are thermally elevated to the conduction band, leading to very low conductivity at low temperatures.
Explanation:
When we talk about "freeze-out" in the context of semiconductors, we are referring to the situation where none of the electrons are thermally elevated to the conduction band. This typically occurs at very low temperatures.
Key Points:
- In a semiconductor material, there are both electrons in the conduction band and holes in the valence band.
- At room temperature, thermal energy can excite some electrons from the valence band to the conduction band, creating electron-hole pairs which contribute to the conductivity of the material.
- However, at very low temperatures, the thermal energy is insufficient to promote electrons to the conduction band. This results in a "freeze-out" of the electrons, as none of them are thermally elevated to the conduction band.
- In this state, the semiconductor material behaves more like an insulator, with very low conductivity due to the absence of free charge carriers in the conduction band.
In conclusion, the term "freeze-out" refers to the condition in a semiconductor where none of the electrons are thermally elevated to the conduction band, leading to very low conductivity at low temperatures.
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What do you mean by the tem ‘FREEZE-OUT’?a)All the electrons are frozen at room temperatureb)None of the electrons are thermally elevated to the conduction bandc)All the electrons are in the conduction bandd)All the holes are in the valence bandCorrect answer is option 'B'. Can you explain this answer?
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