Alumina Coatings on Fluorine-Doped Tin Oxide@Titanium Dioxide as Photoanode for Dye-Sensitized Solar Cells

作者：Zhou, Lu; Wang, Ye Feng; Ren, Fu Ming; Cui, Xiao Rui; Wang, Xin Yi; Zeng, Jing Hui^*

来源：Electrochimica Acta, 2015, 173: 534-539.

DOI：10.1016/j.electacta.2015.05.115

• Fluorine doped tin oxide@titanium dioxide film
• alumina barrier layer
• dye-sensitized solar cell
• electron recombination

Titanium dioxide coated fluorine doped tin oxide film (F-T film) is synthesized and applied as photoanode in dye-sensitized solar cells (DSCs). Efforts to improve the photovoltaic performance are made by coating an Al2O3 barrier layer to serve as the charge recombination barrier. Due to the less electron recombination with oxidized dye or I-3 after two times of Al2O3 coating combined with an efficient electron extraction of F-T film, F-T-2A DSCs exhibits a maximal efficiency of 5.24% improved by 12.4% for F-T DSCs without surface modification. However the cell performance fades due to decreased photoelectron injection from dye molecules into TiO2 conduction band when the barrier became thicker. The thickness of Al2O3 by deposition cycle is well controlled and studied. Electrochemical impedance spectra are applied to disclose the low electron transfer resistance of F-T-2A DSCs for the better cell performance.

• 出版日期2015-8-10
• 单位北京交通大学; 陕西师范大学