Enhancement of Dye Sensitized Solar Cell Efficiency Using Chlorophyll as Dye Sensitizer by Adding the SnO₂ Material to TiO₂

Dye-Sensitized Solar Cell (DSSC) is the third generation of solar cells. DSSC is formed by sandwich structure, there are five parts: ITO glass (Indium Tin Oxide) as the substrate; TiO₂ and SnO₂ as semiconductor material; natural dye from chlorophyll as an electron donor; gel electrolyte as electron transfer and active carbon as a catalyst in the counter electrode. The synthesis of nanometer-sized TiO₂ powder is obtained by coprecipitation method. The layer of TiO₂ was deposited on top of an ITO glass by doctor blade method. From the research, the DSSC efficiency has increased by nearly 100% after additions SnO₂ to TiO₂. The DSSC efficiency result is 0.05% for DSSC before additions and 0.1% after additions.