Multiple exciton dissociation and hot electron extraction by ultrafast interfacial electron transfer from PbS QDs.

Highlights: [•] The electron and hole dynamics can be separated by probing their respective intraband transitions by the transient absorption spectroscopy. [•] The multiple exciton generation in the PbS quantum dots cannot be affected in the presence of the electron acceptors. [•] The strong electronic coupling between PbS quantum dots and TiO2 will lead to a spectral broadening. [•] The electron transfer time from PbS quantum dots to TiO2 is less than 150 fs due to the strong coupling. [Copyright &y& Elsevier]