Engineers have developed a transistor that will allow the use of rain as a source of renewable energy. This is stated in the work of scientists from the City University of Hong Kong, published on the website of the university.
Attempts to use rain as a source of renewable energy have been undertaken before, but until now, scientists have not been able to find an effective way to convert the energy of falling water into electricity.
Now the researchers have created a field effect transistor, which during rain is able to provide a stable voltage of 140 V – this is enough for the simultaneous operation of more than 100 small LED bulbs.
The new design combines an aluminum electrode with an indium and tin oxide electrode coated with PTFE, a material with a “quasi-constant” electric charge. When a drop hits the surface of the PTFE, it connects the two electrodes and creates a closed circuit.
Researchers note that the device is able to work in the event of constant rain. In this case, the voltage builds up and ultimately reaches the saturation point.