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Which mechanism causes energy absorption reduction in high-purity crystal silicon?

A)Phonon-photon energy up-conversion
B)Auger recombination diminishes rapidly
C)Impact ionization probability declines
D)Increased free carrier light scattering

💡 Explanation

The dominant mechanism is Auger recombination diminishing because with fewer impurities that cause electron-hole generation, energy transfer to electrons decreases; therefore, energy absorption is reduced, rather than increased scattering.

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