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Energy Archive

  • More Efficient Solar Cells

    A semiconductor material with three energy bands uses more sunlight, by trapping low-energy photons.


  • A Dangerous Energy Climate

    Panelists at the Emerging Technologies Conference voiced an urgent need for aggressive policies to promote energy efficiency, renewable power sources, and carbon sequestration.


  • Powerful Batteries That Assemble Themselves

    MIT researchers are developing low-cost manufacturing methods based on the rapid reproduction of viruses. Angela Belcher, a panelist at the Emerging Technology Conference, explains.


  • BMW's Hydrogen Hopes

    Hydrogen may never be feasible as a fuel for vehicles, but BMW is pushing ahead anyway with an advanced hydrogen-gas combustion hybrid.


  • Safer, Longer-Lasting Batteries

    Thin-film technology is still expensive, but it could soon run remote sensors and medical implants–and one day electric vehicles.


  • Better Fuel Cells for Laptops

    Adding a chemical found in antifreeze to fuel cells could provide a longer-lasting alternative to batteries in portable electronics.


  • Solar Cells for Cheap

    Not everyone gets a solar cell named after them: but Michael Gratzel did. He says his novel technology, which promises electricity-generating windows and low manufacturing costs, is ready for the market.



From the Archives


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