Hi Physics friends, We purchased a dye-sensitized-sloar cell (DSC) kit for $50 which can make 5 sets of cells (10 pieces of glasses). Hope we can make a good plan so we won't waste the materials. We are thinking of making the dye from berries and change the concentration, and/or using a pencil to add graphite to the glass substrate. Then we could measure the voltage output. Does anyone have suggestions what parameters we could vary and control with these five samples only? Thanks a lot!