Improved efficiency of dye-sensitized solar cells applied with nanostructured N-F doped TiO2 electrode

► It is the first time that N-F-doped TiO2 electrode has been applied in DSSC. ► The trap state densities of TiO2 electrodes were efficiently decreased by N-F doping. ► The efficiency of N3 sensitized N-F-doped TiO2 electrodes was about 17.1% higher than that of pure TiO2 electrodes.