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Here, we demonstrate that the introduction of the monodispersed nanoparticles into photoelectrode materials can obviously improve the photovoltaic performance of dye-sensitized solar cells (DSSCs). The highly transparent dispersions of TiO and Ag nanoparticles with the 2 excellent stability were synthesized respectively. As seed crystals, monodispersed TiO nanoparticles with the diameter of about 5 nm have unique 2 advantages in regulating the growth of multi-branched TiO nanowire arrays (T-MB-TiO ), which have large specific area. Ag nanoparticles 2 2 monodispersed in n-hexane with a small particle size (about 8 nm of average diameter) were incorporated into above-mentioned T-MB-TiO to 2 fabricate the T-MB-TiO /Ag composite photoanode, which combines the advantages of T-MB-TiO with the direct electron transport channels and 2 2 Ag nanoparticles with the localized surface plasmon resonance effect. Therefore, the DSSCs with the composite photoanode achieved excellent 2 photoelectric performance, as high as the short-circuit current density (J ) of 24 mA/cm and the photoelectric conversion efficiency (PCE) of sc 10%. Compared with the cell assembled by the photoanode of pure TiO nanowire arrays grown on the FTO glass directly, J and PCE of the 2 sc cell with T-MB-TiO /Ag composite photoanode has been increased by 48% and 28% respectively, which has a great application potential in the 2 fields of solar cells and photocatalysis.

Preparation of Transparent Dispersions with Monodispersed Ag Nanoparticles for TiO2 Photoelectrode Materials with Excellent Photovoltaic Performance