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Which mechanism inhibits electron excitation to antibonding orbitals in perovskite solar cells?

A)Increased Auger recombination losses
B)Efficient charge carrier extraction
C)Enhanced surface defect passivation
D)Deep trap-state electron tunneling

💡 Explanation

Efficient charge carrier extraction reduces electron density in the perovskite, enhancing the Burstein-Moss effect. This increases the bandgap because electrons fill lower energy states, therefore preventing excitation to antibonding orbitals, rather than recombination/trapping altering orbital energies.

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