The device of polyoxometalate (POM) modified photoelectrodes is designed and successfully constructed. K6SiW11O39Cu(H2O)center dot xH(2)O (SiW11Cu) has been synthesized and explored as an efficient photoanode and counter electrode material to develop dye -sensitized solar cells (DSSCs) with enhanced performance. The SiW11Cu modified TiO2 (SiW11Cu/TiO2) powders is mixed with commercial P25 in a ratio of 1:9 as a photoanode. The modified TiO2 is used as an efficient material by improving the electronic injection ability and reducing the pohotogenerated charge recombination. The counter electrode is consisted of one layer SiW11Cu and two layers conventional Pt nanoparticles, denoted as (Cu/Pt). The DSSC based on SiW11Cu modified photoelectrodes has an improved power conversion efficiency of 7.62%, which is 16% higher than that of traditional DSSC based on P25-Pt. Under standard AM 1.5G, J(sc) reaches 17.91 mA cm(-2), which results in a much better power conversion efficiency. This can be attributed to the good catalytic activity of the new counter electrode. This result is analyzed by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), Tafel-polarization curves, the incident photon to current conversion efficiency (IPCE) and UV-vis spectra techniques. (C) 2016 Elsevier B.V. All rights reserved.