• Question: How do raspberries conduct electricity?

    Asked by danhooper to Jarv on 16 Mar 2012. This question was also asked by sarahx.
    • Photo: Jarvist Moore Frost

      Jarvist Moore Frost answered on 16 Mar 2012:

      The raspberry juice in a Dye-Sensitised-Solar-Cell absorbs light and generates an excited state (the electron jumps up from it’s ground state into a new orbital).

      This excited electron in the red dye of the raspberry is at the right energy to jump into the TiO2 (Titania, a white pigment often found in house paint and toothpaste). This leaves a positive charge on the dye molecule, which is then filled with electrons by the Iodine/Iodide couple in the electrolyte, and completes the circuit.

      And that, essentially, is it 🙂

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