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← ScienceWhich consequence results when defects alter the band gap?
A)Increased electrical carrier recombination rate✓
B)Enhanced phonon scattering efficiency
C)Reduced average crystal lattice spacing
D)Increased material's plastic deformation threshold
💡 Explanation
Defects introduce energy levels within the band gap, which provides pathways for electrons and holes to recombine via Shockley-Read-Hall recombination. This decreases the carrier lifetime because the increased recombination rate rather than affecting phonon scattering.
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