In general, the resistance of semiconductors decreases as their temperature increases. This behavior is in contrast to most conductors, where resistance tends to increase with rising temperature.
The relationship between resistance (R) and temperature (T) in semiconductors can often be approximated by the formula:
R = R₀ * e^(α * T)
Where:
- R₀ is the resistance at a reference temperature (usually room temperature)
- α is a temperature coefficient of resistance
- T is the absolute temperature in Kelvin
- e is the base of the natural logarithm
For most semiconductors, α is positive, meaning that resistance increases with temperature. However, the increase is typically not as rapid as in metallic conductors. This increase is due to the greater thermal vibrations of atoms in the crystal lattice as temperature rises, which leads to more scattering of charge carriers and increased resistance.
In some cases, semiconductors might exhibit negative temperature coefficient behavior over certain temperature ranges. This means that their resistance decreases as temperature increases. Such behavior is often observed in materials used for temperature-sensitive devices, such as thermistors.
Keep in mind that the exact behavior of a semiconductor's resistance with temperature can depend on the material's properties, dopants, and other factors.
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In general, the resistance of semiconductors decreases as their temperature increases. This behavior is in contrast to most conductors, where resistance tends to increase with rising temperature.
The relationship between resistance (R) and temperature (T) in semiconductors can often be approximated by the formula:
R = R₀ * e^(α * T)
Where:
- R₀ is the resistance at a reference temperature (usually room temperature)
- α is a temperature coefficient of resistance
- T is the absolute temperature in Kelvin
- e is the base of the natural logarithm
For most semiconductors, α is positive, meaning that resistance increases with temperature. However, the increase is typically not as rapid as in metallic conductors. This increase is due to the greater thermal vibrations of atoms in the crystal lattice as temperature rises, which leads to more scattering of charge carriers and increased resistance.
In some cases, semiconductors might exhibit negative temperature coefficient behavior over certain temperature ranges. This means that their resistance decreases as temperature increases. Such behavior is often observed in materials used for temperature-sensitive devices, such as thermistors.
Keep in mind that the exact behavior of a semiconductor's resistance with temperature can depend on the material's properties, dopants, and other factors.
Explanation: