A more efficient, lightweight and low-cost organic solar cell: Researchers broke the 'electrode barrier'Thu, 18 Sep 2014 14:14:52 EDT
For decades, polymer scientists and synthetic chemists working to improve the power conversion efficiency of organic solar cells were hampered by the inherent drawbacks of commonly used metal electrodes, including their instability and susceptibility to oxidation. Now for the first time, researchers have developed a more efficient, easily processable and lightweight solar cell that can use virtually any metal for the electrode, effectively breaking the 'electrode barrier.' X-ray imaging paves way for novel solar cell productionTue, 09 Sep 2014 11:33:36 EDT
The sharp X-ray vision of DESY's research light source PETRA III paves the way for a new technique to produce cheap, flexible and versatile double solar cells. The method can reliably produce efficient tandem plastic solar cells of many meters in length. Sun-powered desalination for villages in IndiaMon, 08 Sep 2014 09:37:49 EDT
Around the world, there is more salty groundwater than fresh, drinkable groundwater. For example, 60 percent of India is underlain by salty water -- and much of that area is not served by an electric grid that could run conventional reverse-osmosis desalination plants. Sun-powered desalination could deliver clean water for off-grid villages. Doped graphene nanoribbons with potentialMon, 08 Sep 2014 08:33:42 EDT
Graphene possesses many outstanding properties: it conducts heat and electricity, it is transparent, harder than diamond and extremely strong. But in order to use it to construct electronic switches, a material must not only be an outstanding conductor, it should also be switchable between ”on” and ”off” states. This requires the presence of a so-called bandgap, which enables semiconductors to be in an insulating state. The problem, however, is that the bandgap in graphene is extremely small. Empa researchers from the ”nanotech@surfaces” laboratory thus developed a method some time ago to synthesize a form of graphene with larger bandgaps by allowing ultra-narrow graphene nanoribbons to ”grow” via molecular self-assembly. Breakthrough for carbon nanotube solar cells: Twice as efficient as current modelsWed, 03 Sep 2014 10:58:41 EDT
Lighter, more flexible, and cheaper than conventional solar-cell materials, carbon nanotubes (CNTs) have long shown promise for photovoltaics. But research stalled when CNTs proved to be inefficient, converting far less sunlight into power than other methods. Scientists have now developed a carbon nanotube solar cell that is twice as efficient as its predecessors.