Efficiency enhancement in assisted by Ag　nanoparticles dye sensitized solar cell

[[abstract]]This study focused on the preparation technology and efficiency improvement of photoelectrode in dye-sensitized solar cells (DSSCs). First use of commercially nanoscale titanium dioxide particles (P25), and deployment of deionized water and ethanol were blended to obtain the TiO2 sol-gel solution method, The working electrode were coated with different thickness on ITO conductive glass by spin-coating method In this study, silver nanoparticles (AgNPs) were doped on the titanium oxide (TiO2) photoelectrode to fabricate dye sensitized solar cells. The size effect of AgNPs on TiO2 photoelectrode was discussed. Various sizes of AgNPs were synthesized by chemical reduction method. The silver nanoparticles could reflect indent light and lengthen the optical path in photoelectrode. Moreover, appropriate silver nanoparticles absorbed on the TiO2 surface can reduce the carrier recombination. The UV-vis spectrophotometer, XRD, particle size analyzer, XPS and photovoltaic cell efficiency measurement were used in this study. Use of silver nanoparticles can form the Schottky barrier prolong the electron-hole pairs lifetime and enhance the light absorption of the working electrode, The open circuit voltage, short circuit and efficiency of DSSCs can be improved by using AgNPs/P25 photoelectrode In optimum condition, the open circuit voltage, short circuit current, and efficiency were 0.750 V, 12.287 A, 5.66 %, respectively