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

💡 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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