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  • Guiding the Way to Improved Solar Cell Performance

    Understanding how particles travel through a device is vital for improving the efficiency of solar cells. Researchers from KAUST, working with an international team of scientists, have now developed a set of design guidelines for enhancing the performance of molecular materials.

    When a packet of light, or photon, is absorbed by a semiconductor, it generates a pair of particles known as an exciton. An electron is one part of this pair; the other is its positively charged equivalent, called a hole. Excitons are electrically neutral, so it is impossible to set them in motion by applying an electric field. Instead the excitons "hop" by a random motion or diffusion. The dissociation of the excitons into charges is necessary to create a current but is highly improbable in an organic semiconductor.

    “So typically, we need to blend two semiconductors, a so-called electron donor and an electron acceptor, to efficiently generate free charges,” explains Yuliar Firdaus. “The donor and acceptor materials penetrate into one another; maximizing the exciton diffusion length— the distance the exciton can travel before recombining and being lost— is crucial for optimizing the organic solar cell’s performance.

    Read more: King Abdullah University of Science & Technology

    Bilayer solar cell based on the organic semiconductor copper(I) thiocyanate (CuSCN) provides a new platform for exciton diffusion studies. (Photo Credit: © 2020 KAUST)

     

    >> Read the Full Article
  • Novel Chemical Process a First Step to Making Nuclear Fuel with Fire

    Developing safe and sustainable fuels for nuclear energy is an integral part of Los Alamos National Laboratory’s energy security mission.

    >> Read the Full Article
  • Stable Catalysts for New Energy

    On the way to a CO2-neutral economy, we need to perfect a whole range of technologies - including the electrochemical extraction of hydrogen from water, fuel cells, or carbon capture. 

    >> Read the Full Article
  • Researchers Decipher Structure of Promising Battery Materials

    A class of materials called metal organic frameworks, or MOFs, has attracted considerable interest over the last several years for a variety of potential energy-related applications — especially since researchers discovered that these typically insulating materials could also be made electrically conductive.

    >> Read the Full Article
  • US Methane “Hotspot” is Snapshot of Local Pollution

    A giant methane cloud caught by satellite in 2014 looming over the U.S. Southwest wasn’t a persistent hotspot, as first thought when it made national news.

    >> Read the Full Article
  • Green Hydrogen: Buoyancy-Driven Convection in the Electrolyte

    Hydrogen can be produced with renewable energies in a climate neutral way and could make a major contribution to the energy system of the future. 

    >> Read the Full Article
  • Using Materials Efficiently Can Substantially Cut Greenhouse Gas Emissions

    Emissions from the production of materials like metals, minerals, woods and plastics more than doubled in 1995 – 2015, accounting for almost one-quarter of all greenhouse gas (GHG) emissions worldwide. 

    >> Read the Full Article
  • NREL Advanced Manufacturing Research Moves Wind Turbine Blades Toward Recyclability

    A new material for wind blades that can be recycled could transform the wind industry, making renewable energy more sustainable than ever before while lowering costs in the process.

    >> Read the Full Article
  • Bringing Buildings To Life

    Could buildings imitate living organisms? Negin Imani has created a tool translating natural thermoregulation strategies into architectural solutions.

    >> Read the Full Article
  • Making Biodiesel From Dirty Old Cooking Oil Just Got Easier

    A global team including researchers from The University of Western Australia has developed a powerful, low-cost method for recycling used cooking oil and agricultural waste into biodiesel.

    >> Read the Full Article

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