NEWS COMMENTARY

Researchers at NREL unveil 47.1% efficiency solar cell

Published:
April 16, 2020
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by Patricia Seoane da Silva
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This device consists of a six-junction tandem cell based on various layers of III-V semiconductors, such as GaAs or InP. NREL reported 39.2% efficiency under 1 sun (i.e., standard illumination) and 47.1% efficiency under 143 suns' concentration, which was achieved by depositing a concentrator cell on top of the device. The combination of various cells and light concentration enables for a wider utilization of the solar spectrum in a lower active area. However, not only are these devices extremely complex to design, but III-V semiconductors are scarce in nature, meaning that III-V multijunction solar cells are expensive to manufacture. Clients should only expect this type of cells to fulfill niche applications like powering satellites. 

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