A team of researchers from Saudi Arabia and Hong Kong has developed solar panels that use hydrogels to keep cool. Researchers have tested the solar panels in the laboratory and under real circumstances and noticed that newly developed material has the potential to expand photovoltaic electricity production by up to 19% without using energy. Researchers prepared the hydrogel-based material from polyacrylamide–carbon nanotube substrate and calcium chloride, a powerful water vapor sorbent, and combined it with a commercial solar panel. This new method could have huge implications on the power output of a large plant with many large-scale photovoltaic facilities working in sunny and hot desert conditions.