| 초록 |
Disk shaped TiO2 (DS-TiO2) was prepared by one-step process using titanium(Ⅳ) isopropoxide (TTIP), ethyl cellulose (EC), and mixed solvent, tetrahydrofuran (THF) and toluene. EC has planar structure and it plays significant role in forming two-dimensional disk-shaped structure of TiO2 in this process. The structure of anatase DS-TiO2 was characterized by scanning eletron microscopy (SEM), transmission electron microscopy (TEM), and X-ray photospectroscopy (XPS). The use of DS-TiO2 as a light scattering layer on nano-crystalling TiO2 (NC-TiO2) in quasi-solid-state dye-sensitized solar cells (qssDSSCs) showed better performance (5.0%) than that of NC-TiO2 film only. The increased Jsc of qssDSSCs causing the increase in dye loading and light scattering by introduction of DS-TiO2 is a major contributor to improved performance and it was observed through UV-visible reflectance spectra and incident photon-to-electron conversion efficiency (IPCE) measurements. When using a solid electrolyte, poly((1-(4-ethenylphenyl)methyl)-3-butyl-imidazolium iodide) (PEBII) with DS-TiO2 layer, 6.6% of performance was obtained. |
