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← ScienceWhich mechanism enables elevated efficiency in cadmium telluride solar cells?
A)Grain boundary passivation reducing carrier recombination✓
B)Increased space charge region depletion width
C)Auger recombination increasing efficiency
D)Increased temperature bandgap widening
💡 Explanation
Grain boundary passivation reduces surface defects with dangling bonds. This prevents Shockley-Read-Hall recombination because the passivation introduces chemically stable termination of the crystal lattice, therefore lowering recombination and enabling higher efficiency rather than increasing it due to other recombination enhancements.
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