Effect of annealing temperature on the performance of ZnO thin film-based dye sensitized solar cell

TiO2 based dye sensitized solar cells suffer from fast electrons recombination rate. ZnO, which has wide bandgap energy that similar to TiO2 (Eg = 3.3 eV) and a higher mobility of electron may overcome the issue suffered by TiO2. In this work, ZnO thin film-based dye sensitized solar cells were fabricated. The ZnO thin films were dip-coated on the FTO substrate followed by annealing. The effect of annealing temperature on the morphology, optical and their DSSC’s performance were studied. The result showed that DSSC made of ZnO thin film annealed at 450°C recorded the best power conversion efficiency of 0.68%.