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Which outcome occurs when the crystal defects in a semiconductor lead to impurity banding?

A)Increased conductivity at lower temperatures
B)Reduced electron mobility in conduction band
C)Enhanced piezoelectric charge generation
D)Decreased thermal runaway threshold voltage

💡 Explanation

Increased conductivity occurs because crystal defects cause impurity banding, which allows electrons to hop between impurity sites via Variable Range Hopping (VRH). Therefore, conductivity increases at lower temperatures, rather than being suppressed as in typical semiconductors.

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