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← ScienceWhich risk increases when a crystalline silicon ingot’s lattice structure contains elevated interstitial oxygen?
A)Enhanced minority carrier recombination rate✓
B)Increased piezoelectric coefficient magnitude
C)Reduced free carrier scattering events
D)Higher radiative recombination efficiency
💡 Explanation
Minority carrier recombination elevates with oxygen impurities. Oxygen causes *defect formation*, because these localized distortions in the lattice create mid-gap states that act as recombination centers; therefore, excess oxygen enhances recombination rather than reducing carrier scattering.
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