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← ScienceWhich mechanism limits photovoltage when surface electronic states induce band bending?
A)Surface recombination diminishes carrier separation✓
B)Impurity doping creates depletion region
C)Auger scattering inhibits charge transport
D)Phonon scattering dominates electron mobility
💡 Explanation
Surface recombination limits photovoltage, because surface states trap charge carriers, leading to Shockley-Read-Hall recombination via mid-gap states; therefore, fewer photo-generated carriers contribute to the voltage, rather than the bulk recombination mechanisms.
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