Connect with us

Hi, what are you looking for?


Solar Energy

NREL Sets New World Record for Solar Cell Efficiency

Thin Film made by Iowa Thin Films (DOE)

From time to time the National Renewal Energy Lab (NREL) reminds us that the US used to be a leader in innovation. This time it’s in the area of solar thin film technology. The goal with solar thin film technology is to surpass the efficiency level of silicon solar cells. Efficiency refers to the rate at which sunlight falling on a solar cell is converted to electricity. Silicon has been the most efficient material, but it is is expensive and limited, so the world is seeking alternatives. (Picture above from the Dept. of Energy shows thin film manufactured by Iowa Thin Film Technologies.)

NREL has set a new world record using CIGS (copper indium gallium diselenide) thin film, which in tests has reached 19.9 percent efficiency, coming very close to the 20.3 percent level of multicrystalline solar cells.

“The ‘thin film’ term comes from the method used to deposit the film, not from the thinness of the film: thin-film cells are deposited in very thin, consecutive layers of atoms, molecules, or ions. Thin-film cells have many advantages over their ‘thick-film’ counterparts. For example, they use much less material—the cell’s active area is usually only 1 to 10 micrometers thick, whereas thick films typically are 100 to 300 micrometers thick. Also, thin-film cells can usually be manufactured in a large-area process, which can be an automated, continuous production process. Finally, they can be deposited on flexible substrate materials.” — U.S. Department of Energy

Now, if we only had some government policies that would help spur product development based on NREL’s cool innovation…..

Related Posts:

Thin Film Solar: Ready to Ramp Up Production?

Solar Panels and the Quest for $1/Watt 

The Future of Solar Energy: An Interview with John Sedgwick 

Appreciate CleanTechnica’s originality? 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.

Written By

Carol Gulyas is a leader in the renewable energy community in Illinois, where she serves as VP of the Board of the Illinois Solar Energy Association. Recently she co-founded EcoAchievers -- a provider of online education for the renewable energy and sustainable living community. She spent 18 years in the direct marketing industry in New York and Chicago, and is currently a teaching librarian at Columbia College Chicago. Carol grew up in a small town in central Indiana, then lived in the Pacific Northwest, Lima, Peru, and New York City. She is inspired by reducing energy consumption through the use of renewable energy, energy efficiency, and green building technology.


You May Also Like

Clean Power

Floating solar panels help avoid fights over land use, by deploying reservoirs and other human-made bodies of water.

Clean Power

Satire is a powerful way of outlining the challenges of technology, development, engineering, and financing of the solar industry.

Clean Power

Scientists at NREL seem to have Discovered a Way To Improve Perovskite Efficiency & Stability, making for better solar cells.


Completely unworkable, absurdly optimistic assumptions are made about far future potential costs of non-existent fuel supply chains for hydrogen and things like aluminum.

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.