Q&A: solar cell polymer|What the overall efficiency of this solar array?
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Q&A–: What the overall efficiency of this solar array?
I read an article on a solar breakthrough. They said it absorbs 85 percent of the light. Does that mean it’s 85 percent effecient?
“Caltech Researchers Create Highly Absorbing, Flexible Solar Cells with Silicon Wire Arrays
PASADENA, Calif.—Using arrays of long, thin silicon wires embedded in a polymer substrate, a team of scientists from the California Institute of Technology (Caltech) has created a new type of flexible solar cell that enhances the absorption of sunlight and efficiently converts its photons into electrons. The solar cell does all this using only a fraction of the expensive semiconductor materials required by conventional solar cells.
“These solar cells have, for the first time, surpassed the conventional light-trapping limit for absorbing materials,” says Harry Atwater, Howard Hughes Professor, professor of applied physics and materials science, and director of Caltech’s Resnick Institute, which focuses on sustainability research.
This is a photomicrograph of a silicon wire array embedded within a transparent, flexible polymer film.
[Credit: Caltech/Michael Kelzenberg]
The light-trapping limit of a material refers to how much sunlight it is able to absorb. The silicon-wire arrays absorb up to 96 percent of incident sunlight at a single wavelength and 85 percent of total collectible sunlight. “We’ve surpassed previous optical microstructures developed to trap light,” he says. ”
The following is the answer: (Hint: The correct answer provided by the users, does not guarantee the right.)
Answer by Мэрль
I’ll guess the overall efficiency does not exceed 18.7 percent.
Add your own answer in the comments!
solar cell polymer
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