22 Aug 2012:
Solar Shingles Made from
Common Metals Offer Cheaper Energy Option
U.S. scientists say that emerging photovoltaic technologies will enable the production of solar shingles made from abundantly available elements
rather than rare-earth metals, an innovation that would make
solar energy cheaper and more sustainable. Speaking at the annual meeting of the American Chemical Society, a team of researchers described advances in solar cells made with abundant metals, such as copper and zinc. While the market already offers solar shingles that convert the sun’s energy into electricity, producers typically must use elements that are scarce and expensive, such as indium and gallium. According to Harry A. Atwater, a physicist at the California Institute of Technology, recent tests suggest that materials like zinc phosphide and copper oxide could be capable of producing electricity at prices competitive with coal-fired power plants within two decades. With China accounting for more than 90 percent of the world’s rare-earth supplies — and prices rising sharply — companies and nations are racing to find new sources of rare earth minerals, which are used in everything from solar panels to smart phones.
Yale Environment 360 is
a publication of the
Yale School of Forestry
& Environmental Studies
Yale Environment 360
articles are now available in Spanish and Portuguese on Universia
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Business & Innovation
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A look at how acidifying oceans could threaten the Dungeness crab, one of the most valuable fisheries on the U.S. West Coast. Watch the video.
is now available for mobile devices at e360.yale.edu/mobile
An aerial view of why Europe’s per capita carbon emissions are less than 50 percent of those in the U.S. View the photos.
An indigenous tribe’s deadly fight to save its ancestral land in the Amazon rainforest from logging. Learn more.
video series looks at the staggering amount of food wasted in the U.S. – a problem with major human and environmental costs. Watch the video.
Residents of the Chocó Rainforest in Ecuador are choosing to plant cacao over logging in an effort to slow deforestation.
Watch the video.
Tribal people and ranchers join together to stop a project that would haul coal across their Montana land. Watch the video.