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← ScienceWhich outcome occurs when excessive doping destabilizes a crystal lattice?
A)Decreased mean free path of electrons✓
B)Increased thermal conductivity
C)Higher intrinsic carrier concentration
D)An increase in Hall effect
💡 Explanation
Increased doping introduces defects affecting the crystal lattice. Lattice distortion increases electron scattering via ionized impurities because the mechanism, ionized impurity scattering, disrupts electron flow; therefore, electron mobility drops rather than thermal conductivity increasing in the absence of other effects like Umklapp scattering.
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