Abstract
The multiexponential decay of QDs photoluminescence (PL) in hybrid structures based on QDs and TiO2 nanoparticles has been investigated. We show that both fractions of QDs with long and short PL decay times should be regarded as an electron donor. From the point of view of QDs blinking theory, we estimate the efficiency of electron transfer from neutral and negatively charged QDs. We demonstrate that an efficiency of electron transfer from negatively charged QDs in spite of the effective Auger recombination is quite high. It suggests that a decrease in the Auger recombination efficiency will significantly improve the functionality of hybrid structures based on QDs, such as TiO2/QDs structures.
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