Fabrication and Analysis of Dye-Sensitized Solar Cells (DSSCs) by Using a Li-Treated TiO2 Photoelectrode

Abstract

Dye-sensitized solar cells (DSSCs) contain an electrode featuring a dye-adsorbed nanoporous TiO2 layer on fluorine-doped tin oxide (FTO) glass, redox electrolytes, and a counter electrode. Generally, DSSCs utilize the dye-adsorbed TiO2 layer as the working electrode, a layer of Pt as the counter electrode, and contain an electrolyte with a redox couple (l(-)/l(-)). However, a number of problems remain to be solved to improve the efficiency of DSSCs. We fabricated a hybrid Li-treated TiO2/TiO2 nanotube photoelectrode on a TiO2 passivating layer to improve the dye adsorption and charge transport and reduce the electron recombination.