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Which outcome arises from substitutional impurity atoms modifying a silicon crystal lattice?

A)Increased electron-hole recombination rate
B)Reduced thermal conductivity coefficient
C)Enhanced piezoelectric charge generation
D)Decreased Fermi energy oscillation amplitude

💡 Explanation

Increased electron-hole recombination occurs because substitutional impurities introduce energy levels within the band gap, enabling trap-assisted recombination. Therefore, recombination rate increases rather than piezoelectricity enhancement because lattice strain changes affect carrier lifespan less under the given conditions.

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