3/18/2023 0 Comments Solarcell education![]() ![]() The raspberry juice may be obtained from frozen raspberries. Immerse the coating in a source of anthocyanins, such as raspberry juice. The sample will look quite similar before and after heating you only know it is done if you have observed the darkening stage along the way. (Note: this requires a plate that gets quite hot.) Allow the glass to slowly cool by turning off the hotplate. The surface turns brown as the organic solvent and surfactant dries and burns off to produce a white or green sintered titanium dioxide coating. Heat the glass on a hotplate in a hood for 10-20 minutes. ![]() Leave the removed tape in a spill tray for disposal. Carefully remove the tape without scratching the TiO2 coating. The tape serves as a 40-50 micrometer spacer to control the thickness of the titanium dioxide layer if you push down. Add a small amount of titanium dioxide paste and quickly spread by pushing down and across with a microscope slide before the paste dries. The third side of tape gives an uncoated portion where an alligator clip will be connected Opposite sides of tape will serve as a spacer (see below) so the tape should be flat and not wrinkled. Wipe off any fingerprints or oils using a tissue wet with ethanol. ![]() With the conducting side up, tape the glass on three sides to the center of a spill tray using one thickness of tape. The conducting side will have a resistance of 20-30 ohms. ![]() Identify the conducting side of a tin oxide-coated piece of glass by using a multimeter to measure resistance.
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