Connect with us

Hi, what are you looking for?

CleanTechnica

Clean Power

Solar Cell Efficiency Boosted As Much As 50% With New Optical Element

Solar cell efficiencies can be improved by as much as 50% with the use of a new optical element designed by engineers from the University of Utah, according to recent reports.

The “optical element” — which is essentially just a thin layer of transparent plastic or glass that can sort and concentrate light — can be readily integrated into the glass covering of a solar panel. As a result, the new “polychromat” appears to represent a fairly cheap means of boosting solar cell performance — though, as always, until the technology is commercialized, there are no certainties.

Optical element solar panel

Optical element solar panel

The researchers note that the technology could also be used to improve the power efficiency of cellphones, or to improve camera function in low light conditions.

“Currently, high-efficiency solar cells are very expensive because they have to be carefully manufactured in a complex environment and are only cost-effective for space or defense applications like the Mars Rover,” states Rajesh Menon, a Utah Science Technology and Research (USTAR) assistant professor of electrical and computer engineering at the U. “We have designed a very cheap optical element that can be incorporated into the cover glass of a solar panel that will separate sunlight into various colors.”

The University of Utah provides more:

The polychromat was 50 millimeters wide by 10 millimeters long, with 3 micrometer wide grooves to sort incoming light. The polychromat was made using photolithography for this study, but Menon says it can now be made cheaply by creating a mold of the polychromat and then stamping it out like a DVD.

The team placed the polychromat on top of a photovoltaic device, which is a device that generates a voltage when exposed to energy, especially light. The photovoltaic device is made of two absorber layers: gallium indium phosphide to absorb visible light, and gallium arsenide to absorb infrared light. When the University of Utah polychromat was added, the power efficiency increased by 16%.


“These colors can be absorbed by appropriate solar cells to increase the efficiency of the overall process without increasing the cost,” Menon explains.

Computer simulations were also performed that showed that a polychromat placed on a solar cell with eight different absorber layers possessed a theoretical efficiency of over 50%.

“With our approach, you can almost arbitrarily select the bands of light—within the laws of physics—to give more flexibility in the design of the panel,” states Menon. “With a normal lens it’s very difficult to actually separate the colors, and with a prism it’s difficult to get the separated light exactly where you want it.”

There are still challenges remaining, though, specifically with regard to incorporating the technology into production processes — the researchers think that, at the earliest, the technology could hit the solar market in 5-10 years.

Other applications could arrive earlier, though — “the polychromat concept could also be used to generate a brighter, more power-efficient LCD display in a cellphone, or to boost colors in a camera under low light conditions. These applications are being explored through Menon’s startup company, PointSpectrum Corporation.”

The new findings were just published in the journal Progress in Photovoltaics: Research and Applications.

In related news, an interesting new solar panel — one that’s relatively light and easy to install — just hit the market, coming to us via Giga Solar. Coinciding with the release of the “High Durability (D-Series) solar modules,” we had the opportunity to chat with the company’s Chief Business Development Officer, Sicco Westra. If you’re interested at all in solar panels, I recommend giving it a read.

 
Check out our brand new E-Bike Guide. If you're curious about electric bikes, this is the best place to start your e-mobility journey!
 
 
Appreciate CleanTechnica’s originality and cleantech news coverage? Consider becoming a CleanTechnica Member, Supporter, Technician, or Ambassador — or a patron on Patreon.
 
Have a tip for CleanTechnica, want to advertise, or want to suggest a guest for our CleanTech Talk podcast? Contact us here.

Advertisement
 
Written By

James Ayre's background is predominantly in geopolitics and history, but he has an obsessive interest in pretty much everything. After an early life spent in the Imperial Free City of Dortmund, James followed the river Ruhr to Cofbuokheim, where he attended the University of Astnide. And where he also briefly considered entering the coal mining business. He currently writes for a living, on a broad variety of subjects, ranging from science, to politics, to military history, to renewable energy.

Comments

You May Also Like

Batteries

102 Projects Across America will Receive Seed Funding to Launch New Ideas to Market That Will Create Jobs

Clean Power

The inclusion of a special new perovskite layer has enabled scientists to create a “spin-polarized LED” without needing a magnetic field or extremely low...

Clean Power

Just in time to avert a climate catastrophe, US geothermal energy industry shakes self out of slumber with an assist from oil and gas...

Climate Change

The Utah legislature is reviewing the Utah Roadmap, a plan to reduce carbon emissions in the state by 50% before 2030.

Copyright © 2021 CleanTechnica. The content produced by this site is for entertainment purposes only. Opinions and comments published on this site may not be sanctioned by and do not necessarily represent the views of CleanTechnica, its owners, sponsors, affiliates, or subsidiaries.