| 초록 |
We report a novel, one-step preparation of two-dimensional (2D), disk-shaped TiO2 (DS-TiO2) scattering layer with ethyl cellulose (EC), titanium isopropoxide (TTIP), and solvents. Especially, the planar structure of EC was utilized as the template to prepare DS-TiO2 light scattering layers. The DS-TiO2 paste was prepared by dissolving EC and the addition of TTIP sol-gel, and directly doctor-bladed on substrate. Also, the disk-shaped structure was well-developed due to the poor interaction of toluene with TTIP sol-gel solution. The quasi-solid-state dye-sensitized solar cells (qssDSSCs) with a DS-TiO2 scattering layer on a commercial nanocrystalline TiO2 (NC-TiO2) photoanode and a nanogel electrolyte, exhibited an energy conversion efficiency of 5.0 % without any TiCl4 treatment, much higher than that of only NC-TiO2 phoatoanode (4.2 %). Moreover, a high efficiency of 6.6 % was acheived using solid-state polymerized ionic liquid electrolyte (PIL) due to the high mobility of electrolyte and large interstitial pores between DS-TiO2 nanoparticles. The DS-TiO2 layer exhibited an excellent light scattering ability to scattering the light back into the nanocrystalline TiO2 layer, and in turn, it resulted in the short-circuit current density (Jsc) being significantly increased. |
