Performances of ZnO-Based Dye Sensitized Solar Cells Fabricated by Hydrothermal Synthesis and Sol-Gel Technique

摘要: ZnO is introduced as an alternative to TiO2 in dye sensitized solar cells (DSSCs) due its band gap similar TiO2, higher electron mobility, and flexible procedures of preparations. Several samples films are prepared with the hydrothermal synthesis method sol-gel technique, respectively. These were assembled photoanodes DSSCs using N3 sensitizer. The ZnO-based by show typical current source characteristics, whose fill factor (FF) 0.44 photo-to-electric power conversion efficiency 0.34%. On other hand, all technique accompanied characteristics relatively efficiencies (1%) but a lower FF (0.26). X-ray diffraction (XRD) atomic force microscopy (AFM) measurements indicate that have small particles sizes. Therefore, could adsorb more molecules generate high efficiencies. At same time, grain boundaries make it possible for injected electrons recombine oxidized electrolyte. Hydrothermal bigger grains, so they poor FF.