Scientists Develop solar cells with Conversion Efficiencies Close To 50%

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On April 14, according to foreign media reports, a new study published by the National Renewable Energy Laboratory (NREL) in "Natural Energy" showed that scientists have created a solar cell with an efficiency close to 50%. To build this device, NREL researchers relied on Group II-V compound materials with broad light absorption properties. Each of the six connection points (photosensitive layers) of the battery is specifically designed to capture light in a specific part of the solar spectrum.

The device contains 140 layers of III-V materials to improve the performance of these connection points. Due to the high efficiency and manufacturing cost of III-V solar cells, it is most commonly used to power satellites, which makes the performance of III-V materials unmatched. The researchers said that the six-junction solar cell currently holds the world record for the highest conversion efficiency of 47.1%, which was measured under concentrated lighting. Even under sunlight, the conversion efficiency is as high as 39.2%, which is currently the highest record.

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