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hall coefficient of a lightly doped semiconductor will decrease with increase in temp as hall coefficient is inversely proportional to number density of charge carriers.

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Jatinder Kaur

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10y ago

Hall coefficient of the given sample falls with rise in temperature

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Q: What is the effect of temperature on hall coefficient of a lightly doped semiconductor?
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What is the effect of temperature on an intrinsic semiconductor?

An intrinsic semiconductor is basically a pure semiconductor, though some might argue that a small amount of doping can still yield an intrinsic semiconductor. In the crystal structure of this material, there are very few electrons crossing the band gap into the conduction band, and this stuff doesn't want to conduct much current. But as temperature increases, more electron-hole pairs will appear as electrons jump that band gap and take up places in the conduction band. And if you guessed that increasing temperature will permit the intrinsic semiconductor to conduct current flow a bit better, you'd be right. The intrinsic semiconductor has a positive temperature coefficient. More heat, more conduction under the same conditions.


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Why intrinsic semiconductor has negative halls coefficient?

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How does temperature effect semiconductors?

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What happens to the resistance of a material with a positive temperature coefficient when it is heated?

Positive Temperature coefficient indicates that the resistance of material INCREASES with rise in the temperature. Resistance Temperature COefficient(RTC) is defined as increase in resistance per unit original resistance per unit rise in temperature. Temperature Coefficient of Resistance=R2-R1/(R1*(T2-T1)) Where: R2:Resistance at temperature T2 R1:Resistance at temperature T1 SO from formula it is clear that if resistance increases with temperature(T2-T1>0 and R2>R1) then Difference R2-R1 will be positive hence RTC will have positive value. But if with increase in temperature(T2-T1>0) resistance decreases(R2<R1) then difference R2-r1 will be negative hence RTC will be negative.


What is kink effect?

The 'kink effect' now-a-days used in semiconductor physics describes the design characteristic of a semiconductor device. The design earns it's name after 'Hofmeister kink effect' a car design which describes sharp streamlined type (by look) design of rear window bottom. The kink effect in semiconductor device describes such sharp heterojunction intentionally or unintentionally observed in the device.


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