Dust drastically lowers the output of solar panels, but applying an electric field to the panels can make dust particles repel each other and disperse
Sreedath Panat and Kripa Varanasi
Some of the largest solar farms in the world are in deserts, such as Mohammed bin Rashid Al Maktoum Solar Park in the United Arab Emirates and Desert Sunlight Solar Farm in California. These environments tend to be very dusty, with particles quickly accumulating on solar panels. One month’s dust build-up can cut a solar panel’s output by around 40 per cent.
To help solve this issue, Varanasi and his colleagues created a water-free way of cleaning solar panels via static electricity in the laboratory.attaches onto the surface of a dust particle – a process known as adsorption. The thin glass sheets that cover solar panels also aren’t conductors. To change this, Varanasi’s team added a 5-nanometre layer of transparent zinc oxide and aluminium to a solar panel’s surface.
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