With nearly 40 percent efficiency.
The novel solar cell is built on an architecture known as inverted metamorphic multijunction cells. The cell has three components that generate electric current in response to light.
Importantly, each of those junctions is built of a different material: gallium indium phosphide on top, gallium arsenide in the center, and gallium indium arsenide on the bottom. As these materials specialize in various light wavelengths, this allows the cell to capture more energy from the whole light spectrum.Moreover, the researchers used "quantum wells" in the middle layer, which enabled them to achieve the new record efficiency.
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