Materials List: Organic Solar Energy and Berries

Each group needs:

  • 1 indium tin oxide/titanium dioxide-coated plate; possible sources include the Dutch company Man Solar at and the University of Washington's Chemistry Department at
  • 1 uncoated glass plate, available in kit from
  • 1 pencil
  • 1 paper clip
  • 2 alligator clips with wire leads
  • a light source, such as a microscope lamp
  • a device to power, such as a calculator, musical greeting card or small motor

To share with the entire class:

  • 10 mL anthocyanin dye from black cherry concentrate, available online at,, or
  • 1 Petri dish
  • 10 mL iodine in potassium iodide electrolyte solution; put in small dropper bottle
  • 1 small (<20mL-size) dropper bottle
  • ethanol, to rinse glass plates to remove dye