Solar power is used to improve our energy structure, but it is as susceptible to overheating as our smartphones, which can cause some trouble for energy. Stanford researchers seem to have found a solution.
Today's solar cells can convert 30% of their energy into usable energy. One of the problems with low efficiency conversion is that solar cells are overheated. Under normal operating conditions, solar cells can reach 130 degrees Fahrenheit. An increase of every 1.8 degrees Fahrenheit will reduce the efficiency of solar cells by about half a percentage point, and increase the aging rate of solar cells by two times every 18 degrees Fahrenheit.
Stanford University professor of electrical engineering, came up with a solution to the problem of efficiency and longevity: their embedded tapered structure on a layer of silica glass, and the use of thermal redirection heating, so that heat away from solar cells. "Our new approach can passively reduce the operating temperature of solar cells, significantly increase energy conversion efficiency, and increase the life expectancy of solar cells," the researchers said. They tested two solutions, a flat surface and a micropyramidal structure surface. They found that the solar energy absorption of this structured surface outperforms a flat surface. The next step is to test the cooling performance of the structure in an outdoor environment. The research team believes that this technology has "the potential for substantial commercialization."
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