In this study, we used successfully sol-gel method with electrospinning technique to prepare the titanium dioxide (TiO 2) nanofibers (NFs) containing graphene oxide (GO) and silver (Ag) nanoparticles (NPs). We modified the photoanode of dye-sensitized solar cell (DSSC) based on various composited TiO 2 NFs. TiO 2 colloid was first deposited on the fluorine-doped tin oxide (FTO) substrate by a blade coating method. Then, TiO 2 /GO or TiO 2 /GO/Ag NF was seeded beside the TiO 2 colloid layer as an additional layer on photoanode of the DSSC. With solar simulator under AM 1.5, we discussed the effect of GO and Ag composited TiO 2 NFs on photovoltaic conversion efficiency (η). We discovered that TiO 2 /GO NF or TiO 2 /GO/Ag NF seeded on photoanode of DSSC as an additional layer could improve η, increased 16% or 40% respectively, compared with a standard DSSC. Efficiency of TiO 2 /GO/Ag NF seeded as the additional layer on photoanode of DSSC exhibited significant increase. According to our study, in the interface resistance between internal components analyzed by electrochemical impedance spectroscopy, we found that the additional composited TiO 2 NFs layer could prohibit recombination of electrons between the interface of TiO 2 and electrolyte, which resulted in the increase of carrier transport impedance. In addition, Ag NPs could be considered as an effective approach to enhance electron harvesting. • We discovered that TiO 2 /GO NF or TiO 2 /GO/Ag NF seeded the additional layer on photoanode of DSSC could improve η, increased 16 % or 40 % respectively, compared with a standard DSSC. • We found that the additional composited TiO 2 NFs layer could prohibit recombination of electrons between the interface of TiO 2 and electrolyte, which resulted in the carrier transport impedance (R 2) increased. • Ag NPs could be considered as an effective approach to enhance electron harvesting. [ABSTRACT FROM AUTHOR]