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← ScienceWhich mechanism causes increased conductivity when n-type semiconductors heat?
A)Thermal lattice vibrations scatter electrons increases
B)Increased thermal generation minority carriers
C)Impurity band ionization rate escalation✓
D)Fermi level approaching the conduction band
💡 Explanation
Increased temperatures excite electrons into the impurity band leading to easier conduction via increased charge. It's impurity band ionization that matters, because thermal generation of minority carriers is less significant at these doping levels, rather than just lattice vibration.
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