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Silicon is doped with a donor such that the donor level is 0.1 eV below the...

Silicon is doped with a donor such that the donor level is 0.1 eV below the bottom of the conduction band. If the electrical conductivity at –25 °C is 2/ohm*cm, calculate the conductivity at –196 °C.

Why is the new conductivity higher or lower than at –25 °C?

Hint: Assume donor exhaustion occurs at temperatures above room temperature.

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