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Submission + - Full spectrum solar cells ( 1

Diego Manuel writes: "BERKELEY, CA — Researchers in the Materials Sciences Division (MSD) of Lawrence Berkeley National Laboratory, working with crystal-growing teams at Cornell University and Japan's Ritsumeikan University, have learned that the band gap of the semiconductor indium nitride is not 2 electron volts (2 eV) as previously thought, but instead is a much lower 0.7 eV. The serendipitous discovery means that a single system of alloys incorporating indium, gallium, and nitrogen can convert virtually the full spectrum of sunlight — from the near infrared to the far ultraviolet — to electrical current"
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Full spectrum solar cells

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  • Isn't indium rather rare? $300+ per lb? Wouldn't that make its use in solar cells prohibitively expensive? (Except maybe in space applications where reducing weight is paramount...)

In 1750 Issac Newton became discouraged when he fell up a flight of stairs.