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Decay kinetics of CdTe QDs before (stars) and after (circles) energy transfer under 800 nm laser excitation. ET denotes energy transfer.
Concentration dependence of nonradiative energy transfer efficiency (triangles) and trapping emission weight decrease percentage (stars). Smooth line is the fitting curve.
Schematic representation for the electron exchange mechanism (a) and energy transfer between CdTe QDs and TSPP with two-photon excitation (b).Lowest unoccupied molecular orbital (LUMO); highest occupied molecular orbital (HOMO); , donor; , acceptor; filled circle, electron initially on the donor; hollow circle, electron initially on the acceptor; conduction band minimum (CBM); electron surface states (ESSs); hole surface states (HSSs); valance band maximum (VBM).
Kinetic parameters of CdTe QDs and energy transfer efficiency calculated at different concentration of TSPP. , pure CdTe QDs; , QD-porphyrin mixtures at different concentration of TSPP ( , , , , and ); and , relative intensity weight of the excitonic and trapping state; , average excited-state lifetime of donors; , nonradiative energy transfer efficiency; , total energy transfer efficiency.
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