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Concentrated photovoltaics (CPV) are a technology that generates electricity from sunlight. You probably know that already, but now a team of researchers have worked on enabling CPV systems for rooftop use by combining photovoltaic cells and a 3D printed plastic lens array which not only reduces the size and weight, but also cuts the total cost of such systems.
Using miniaturized photovoltaic cells of gallium arsenide, the 3D printed plastic lens arrays, and a focusing mechanism which moves to track the sun, a traditional solar panel can be placed on the south-facing side of a building’s roof.
The researchers discovered that they could reach 70 percent optical efficiency — and they hope to reach 90 percent efficiency — using their design.
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3D printed plastic lens array
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