It's Gonna Be Lit
Henry Xi, Yian Zhang
Burnaby North Secondary
Floor Location : M 085 E

“It’s Gonna Be Lit”
Science 9 E // Ms Bernabei
Henry Xi and Yian Zhang

Dye-sensitized solar cells (DSSC) are currently the most efficient thin cell technology, being able to absorb the photons released by the sun and injecting electrons into the semiconductor band to produce energy. Currently, the widely-used titanium dioxide semiconductor structure is mesoporous, with a pore diameter ranging from 2 to 50 nanometers. The goal of this project is to test whether or not using a microporous structure like tin oxide, with pore diameters less than 2 nanometers, will be more efficient and generate more energy for the cell. The entire cell is completely homemade, which means that aside from the semiconductors, every other component must be controlled. Using raspberries juice as the anthocyanin dye, indium tin oxide glass as the conductive slides, carbon soot as the redox catalyst, and a tri-iodide solution as the electrolyte solution, two groups of homemade DSSC were made: one with titanium dioxide as the semiconductor and the other with tin oxide. It was discovered that although the tin oxide cells had a higher voltage, it also had a higher resistance which ultimately brought down the current and the power. Thus, the titanium dioxide still stands as the more efficient semiconductor, being able to produce more power when tested. Although both cells produced an insignificant amount of energy, there are still many adjustments that can be made to the entire cell itself, to make it the most efficient solar technology ever created.