1 Fabrication of titanium dioxide film. First put the titanium dioxide powder into a mortar and grind it with the binder, then use a glass rod to slowly coat the conductive glass, put the titanium dioxide film under an alcohol lamp and sinter it for 10-15 minutes, then cool it down.
2 Coloring titanium dioxide with natural fuels. Squeeze fresh or frozen black plum, jasmine, pomegranate seeds or black tea with a tablespoon of tax, then put the titanium dioxide film in for coloring, it takes about 5 minutes until the film layer turns deep purple. If the coloring on both sides of the film layer is uneven, you can soak it in it for 5 minutes, then rinse it with ethanol, and dry it gently with soft paper.
3 Make the Counter Electrode A battery needs a positive electrode. Of course a counter electrode is also required. The positive electrode, like the counter electrode, is composed of a conductive SnO2 film layer. A simple multimeter can be used to judge which side of the glass is conductive. It can also be judged by fingers, and the conductive surface is relatively rough. Mark the non-conductive side with a ‘+’, and then use a pencil to evenly coat the conductive side with a layer of graphite.
4 Add electrolyte. A solution containing iodine ions is used as an electrolyte for solar cells, which is mainly used to reduce and regenerate fuels. Add one or two drops of electrolyte on the surface of the titanium dioxide film.
5 Assemble the battery. Put the colored titanium dioxide film face up on the table, drop one or two drops of electrolyte containing iodine and iodine ions on the film, and then press the conductive side of the counter electrode down on the titanium dioxide film. Slightly stagger the two pieces of glass so that the exposed part can be used as an electrode test. Use two clips to clamp the battery, so that the solar battery is made.
6 battery test. Under outdoor sunlight, a solar cell with an open circuit voltage of 0.4V and a short circuit current of 1mA/cm2 can be obtained.
Post time: Dec-16-2022