Noval Zn2SnO4-Doped TiO2 Photoanode for Dye-Sensitized Solar Cells

Abstract

Zn 2 SnO 2 doped TiO 2 photo anode material general formula of (100-x) TiO 2 + x Zn 2 SnO 4 (x=0, 3, 5 and 7 mol%)are synthesized by simple solid-state reaction method followed by high-energy ball milling for 20 hours to form the homogeneous nano scaled photo anode material.Zn 2 SnO 4 doped TiO 2 photo anode shows improvement of power conversion efficiency of DSSC.Power efficiency and Zn 2 SnO 4 nanoparticle distribution output with the increased surface area was investigated by SEM and XRD analysis.After Zn 2 SnO 4 doping, the conductivity of the TiO 2 powder enhanced, and its flat-band potential (V fb ) has a positive shift.The energy-conversion efficiency of a cell based on 5.0 mol% Zn 2 SnO 4 -doped TiO 2 is significantly better, by about 16.1 %, compared to that of a cell based on un doped TiO 2 .Ball milling process exhibited the best performance with optimized solar energy conversion efficiency of 8.83 % with fill factor of 0.712.