Electrospinning Fabrication Of Titania-based Nanomaterials Used For Dye-sensitized Solar Cell

TiO2-based nanomaterial which can convert solar energy into chemical energy is considered to be an effective way of solving the increasingly serious energy shortages and environmental crises because of their excellent oxidative capacity and chemical stability.In this dissertation, Y2O3and Y2Ti2O7nanomaterials doped with different rare earth ions were prepared by electrospinning technique combined with hydrothermal method. These nanomaterials are important to improve the efficiency of solar energy conversion of dye-sensitized solar cells. Specific work includes the following aspects:(1) TiO2/Y2O3:Yb3+, Er3+composite nanofibers were fabricated via electrospinning technique combined with hydrothermal method. The effect of the doping concentration on luminescence characteristics of TiO2/Y2O3: Yb3+, Er3+composite nanofibers were investigated. The luminescence intensity of TiO2/Y2O3:Yb3+, Er3+composite nanofibers was increased with the increasing of Y2O3:Yb3+, Er3+contents.(2) Y2Ti2O7:Eu3+nanofibers were prepared by electrospinning technique. The results demonstrated that Y2TiO7:Eu3+nanofibers showed good luminescence performance. The strongest emission intensity was achieved when the doping concentration of Eu3+was5%.(3) Y2Ti2O7:Yb3+, Er3+nanofibers have been successfully prepared by electrospinning techniques. The results demonstrated that luminescence intensity increased with the increasing in doping concentrations of Er3+or Yb3+. The strongest luminescence emission intensity was achieved when the doping concentrations of Yb3+and Er3+were10%and1%, respectively. In addition, we also prepared Y2Ti2O7/TiO2parallel-nanofibers and investigated the luminescent properties.