Study the Effect of Tio2 Nanoparticles in Multilayers of Photoelectrode Prepared by Ball Milling Technique on The Performance of Dye Sensitized Solar Cells (Dsscs)

Abstract

Abstract In this paper, dye sensitized solar cells (DSSCs) were prepared using nanoparticles of TiO2 downscaled using ball milling technique. 8 hours milling time was used at a constant speed of up to 70% of the critical speed. The obtained average particle size of (2.8 nm) was examined by means of (Fe-SEM) electron microscopy images. Thin films of these particles were prepared, and dye-sensitized solar cells were made using (N719) dye. The effect of particle size on the performance of the conversion efficiency of DSSCs was studied by balancing light scattering and surface area. Large particles have a strong light-scattering lead to a significantly decreased surface area and small particles have a large surface area and weak light scattering. Therefore, it has been proposed to utilize multiple (mono, bi and trilayers) photoanode for dye-sensitized solar cells. The results showed that cell with trilayer photanode has better efficiency than that of monolayers and bilayers. the conversion efficiency (0.9%) was obtained for the single layer and (1.01%) for the bilayer and (1.18%) for the trilayer.