(AHL) Photovoltaic cells and DSSCs
Organometallic ruthenium compounds A simple dye-sensitized solar cell is easy and cheap to make (see Practical work below) using a dye such as tea, onion skin or raspberries. Commercial cells are more expensive as they use platinum as the cathode although promising research has been carried out to replace the platinum with cobalt sulfide. This is much cheaper and also more efficient. Commercial cells also use...