Abstract
This thesis attempts to enhance the performance of dye-sensitized solar cells (DSSCs) by integrating the TiCl4 treatment on porous TiO2 and a novel high-reflective counter electrode, Pt/FTO/Al. Experimental results indicate that light scattered by TiCl4-treated large TiO2 particle sizes and light reflected by the counter electrode decrease the total transmission of the modified cell. Additionally, the modified DSSCs significantly increase the short-circuit photocurrent density (Jsc) by about 34% higher than that of the standard cell, resulting in about 42% higher than that of a standard cell. In the next study, we focus on the DSSCs with the TiCl4 treatment and the Ti-deposited thin film metal on FTO of the enhancement of collection efficiency to improve cells. The modified DSSCs give the significantly improvement of the short-circuit photocurrent density (Jsc) about 42% greater than that of the standard cell, and resulting in a 6.13% energy conversion efficiency. Finally, we had fabricated a flexible DSSC, the substrate of photoelectrode was PET-ITO, and the substrate of counter electrode, and the conversion efficiency of flexible DSSC was 2.27%.