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With the increasing energy crisis and the prevalent concept of greensustainability, quantum dot materials have become a hot spot in the academicand industrial fields of chemistry. Due to unique, tailor-made photovoltaicproperties based on marked quantum-confined effects, it's necessary to identifythe QD-based charge transfer process connected with a lifetime of stimulatedexcitons. Additionally, inorganic nanoparticles with a continuum of electronstates contribute to the consistency between electron dynamics and theirfunction through complexation with QDs. Ultrafast spectroscopy can be widelyused in this system, the most typical of which is the time-resolved transientabsorption spectroscopy, especially on a femtosecond or picosecond timescale.In this paper, we used the ZnSe/CdS core-shell quantum dot as the donor, andthe TiO2 film as the metal oxide molecule as the acceptor, through steady-stateand transient absorption techniques. Within, the electron transfer and relatedprocesses between the two composite systems were explored, and the relationshipbetween the electron transfer rate constant (kBET) and particle size and QDcore size was further studied. Through the research content of this paper, itis hoped to provide materials for quantum dot sensitization devices with morecontrollable features.

Study on Transient Spectrum Based on Charge Transfer of Semiconductor Quantum Dots