Masdar Launches Africa's Largest Solar PV Plant
15MW Sheikh Zayed Solar Power Plant in Mauritania accounts for 10 percent of nation's grid capacity
Solvay Technologies Propel Solar-Powered Flight "Across America"
Solar Impulse is the world's first solar-powered airplane capable of flying day and night without fossil fuel.
Vestas and GE were neck-and-neck for lead in wind's record year
Chinese manufacturers fall in rankings due to a shrinking home market, but a Chinese utility is now the world's largest wind asset owner.
California Shines in Comprehensive Solar Job Count for all 50 States
State solar policy that lowers costs, increases investment is a major job driver
ESA Renewables Executes Three Rooftop O&M Contracts in North Carolina
ESA will begin operating and maintaining three 500kW photovoltaic solar systems in North Carolina.
SEIA Applauds Walmart for Expanding Clean Energy Initiatives
PARADOX ENGINEERING AWARDED AS THE MOST INFLUENTIAL CLEAN ENERGY ADVOCATE WITHIN THE POWER & ELECTRICITY WORLD ASIA 2013 EXHIBITION
Power & Electricity World Asia 2013 exhibition is the most influential and the largest power and electricity event in the Asia Pacific region.
Ethanol Safety Seminars Coming to Ohio
The first seminar will be held on Wednesday, April 24th at the American Red Cross in Akron.
LEEDCo Introduces The POWER Pledge to Engage Community in Promoting Offshore Wind Energy in Lake Erie
Members of the public are pledging to buy a portion of their electricity from offshore wind once Lake Erie's "Icebreaker" demonstration project is complete in 2017.
World Energy Leaders Take Action on Clean Energy
Major Announcements Made at the Fourth Clean Energy
Ministerial (CEM4)
New Data Underscores Need for Ecotech's Business Administration – Sustainability Program
Ecotech Institute's Clean Jobs Index Indicates Nearly 60,000 Jobs in March that Require Both Business and Sustainability Knowledge
Princeton Review Lists Frostburg State University Among "Greenest Colleges"
The Princeton Review highlights Frostburg's commitment to both green education and lifestyle, highlighting the Learning Green
Growing a Solar Park in California's Central Valley
The Westlands Solar Park also represents an innovative approach to large-scale renewable energy development.
SEIA Joins BlueGreen Alliance in Calling for Renewed Efforts to Create Jobs
Solar is one of the fastest-growing industries in the United States
The Solar Cell That Turns 1 Photon into 2 Electrons
Solar cells are picky. If an incoming photon has too little energy, the cell won’t absorb it. If a photon has too much, the excess is wasted as heat. No matter what, a silicon solar cell can never generate more than one electron from a single photon. Such harsh quantum realities severely limit the conversion efficiency of photovoltaic cells, and scientists have spent decades looking for work-arounds.
Now, researchers at the Massachusetts Institute of Technology’s Center for Excitonics have published a compelling case that the key to greater solar efficiency might be an organic dye called pentacene. In today’s issue of Science Daniel Congreve, Jiye Lee, Nicholas Thompson, Marc Baldo and six others show that a photovoltaic cell based on pentacene can generate two electrons from a single photon—more electricity from the same amount of sun. Scientists have suspected for some time that this might work; today’s paper is proof of concept.
The key is a phenomenon called singlet-exciton fission, in which an arriving photon generates two “excitons” (excited states) that can be made to yield two electrons. Previous researchers had accomplished similar tricks using quantum dots (tiny pieces of matter that behave like atoms) and deep-ultraviolet light. “What we showed here,” Baldo says, in addition to using visible light, “is that [this process] works very, very effectively in organic materials.” Full Article:
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