Document Type

Honors Project

First Advisor

Dr. Ian McNeil

Degree Award Date

Summer 7-18-2022


Dye Sensitized Solar Cells, Cyclic Step Chronopotentiometry


Chemistry | Physical Chemistry


A dye sensitized solar cell was created using dye extracted from raspberries, a TiO2 semiconductor paste, and an iodine electrolyte solution for the purpose of performing cyclic step chronopotentiometry. A voltage was applied and removed to observe how the voltage across the solar cell rose and decayed. The decays were fit to a biexponential curve and the constants were compared between the various trials to analyze trends between the time the voltage is on and off, a light being shown or not, 30 μA and 30 mA, and a electrolyte solution with or without lithium. The biexponential demonstrated how there are lifetimes for electrons diffusing out of the solar cell on the scale of seconds.