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Peter Palomaki
University of Oregon microscope puts spotlight on the surface structure of quantum dots for designing new solar devices EUGENE, Ore. — Nov. 20, 2014 — A potential path to identify imperfections and improve the quality of nanomaterials for use in next-generation solar cells has emerged from a collaboration of University of Oregon and industry researchers. To increase light-harvesting efficiency of solar cells beyond silicon's limit of about 29 percent, manufacturers have used layers of chemically synthesized semiconductor nanocrystals. Properties of quantum dots that are produced are manipulated by controlling the synthetic process and surface chemical structure. This process, however, creates imperfections at the [...]
Fri, Nov 21, 2014, Continue reading at the source
Photo: Chris Kucharik
Each year, the planet balances its budget. The carbon dioxide absorbed by plants in the spring and summer as they convert solar energy into food is released back to the atmosphere in autumn and winter. Levels of the greenhouse gas fall, only to rise again. But the budget has gotten bigger. Over the last five decades, the magnitude of this rise and fall has grown nearly 50 percent in the Northern Hemisphere, as the amount of the greenhouse gas taken in and released has increased. Now, new research shows that humans and their crops have a lot to do with it, [...]
Fri, Nov 21, 2014, Continue reading at the source
SolarCity installing projects at Walmart facilities over the next four years. SAN MATEO, Calif., – SolarCity (Nasdaq: SCTY) today announced it has entered into contract with Walmart for the installation of new solar projects at facilities in up to 36 states over the next four years. SolarCity has completed more than 200 solar projects at Walmart locations since 2010. SolarCity has also installed and tested energy storage projects co-located with solar power generation at 13 Walmart facilities since early 2013, and will be incorporating ten additional storage projects in the next year. Since the company's last announcement in 2013, SolarCity has installed [...]
Thu, Nov 20, 2014, Continue reading at the source