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← ScienceWhich outcome reduces the efficiency when germanium crystals operate above 100°C?
A)Increased electron-hole recombination rate✓
B)Enhanced crystal lattice superconductivity
C)Reduced phonon scattering amplitude
D)Increased spontaneous ferromagnetic alignment
💡 Explanation
Increased temperature increases the probability of electrons moving to the conduction band, and electron-hole recombination occurs more frequently because thermal energy overcomes the bandgap. Therefore, efficiency declines, rather than enhancements, because more electrons are available for undesired recombination events.
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