Abstract
Abstract Fluorine doped anatase TiO2 nanoparticles are synthesized by hydrothermal method and applied in dye-sensitized solar cells (DSCs) as excellent photoelectrode material. The result shows that fluorine-doping can positively shift the conduction band of TiO2, thus enlarge the driving force for efficient electron injection, reduce the interfacial losses from the charge recombination and consequently facilitate the charge transfer. The conversion efficiency of DSCs with fluorine-doped TiO2 electrodes is improved by 16.2% and results in a 23.1% photocurrent gain. This paper provides a comprehensive understanding on the behaviors of fluorine-doping TiO2 in DSCs from the conduction band shift and the mechanism of electron injection, transfer and recombination and a promising strategy to explore high efficiency DSCs.
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