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Which mechanism limits the energy transfer efficiency between two quantum dots with mismatched energy levels in adjacent orbitals?

A)Increased vibrational relaxation
B)Decreased Förster resonance energy transfer
C)Enhanced Auger recombination
D)Increased surface trapping of excitons

💡 Explanation

When energy levels are mismatched, Förster resonance energy transfer (FRET) efficiency decreases because the spectral overlap between donor emission and acceptor absorption is reduced, limiting the nonradiative dipole-dipole energy transfer. Therefore decreased FRET results, rather than increased vibrational relaxation, Auger recombination or surface trapping, which require different defect mechanisms.

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