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Which mechanism impairs silicon photovoltaic cell efficiency at elevated temperatures?

A)Auger recombination quenches electron-hole concentration
B)Increased phonon scattering blocks photon absorption
C)Enhanced piezoelectricity fractures the crystal
D)Dopant atoms sublimate from the active area

💡 Explanation

Auger recombination impairs efficiency as thermal energy promotes electrons across the band gap, increasing minority carrier density. This increase drives **Auger recombination**, because the excess energy dissipates via electron interactions rather than power, therefore reducing cell voltage rather than absorption losses.

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