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    Breaking News

    NREL Opens Large Database of Inorganic Thin-Film Materials

    The High Throughput Experimental Materials (HTEM) Database contains more than 140,000 sample entries collected by NREL.

    NREL Opens Large Database of Inorganic Thin-Film Materials
    NREL’s HTEM Database group includes Andriy Zakutayev (left), Robert White, John Perkins, Marcus Schwarting, Caleb Phillips and Nick Wunder. (Photo by Dennis Schroeder/NREL)
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    04.04.18
    An extensive experimental database of inorganic thin-film materials that organizes a decade’s worth of research at the Department of Energy’s National Renewable Energy Laboratory (NREL) is now publicly available.
     
    The High Throughput Experimental Materials (HTEM) Database contains more than 140,000 sample entries collected by NREL scientists investigating inorganic materials for use in advanced energy applications, such as thin-film solar cells. The entries provide details about the structural, chemical and optoelectronic properties of the materials, and their synthesis conditions. More than half of these data are currently available online at htem.nrel.gov.
     
    “All existing experimental databases either contain many entries or have all this property information, but not both,” said Andriy Zakutayev, a scientist at NREL’s Materials Science Center, which is dedicated to developing new materials and devices for solar cells and other renewable energy technologies. Zakutayev and Caleb Phillips, a data scientist with the Computational Science Center at NREL, led the newly published paper “An open experimental database for exploring inorganic materials.”
     
    Published in Scientific Data, the paper also was co-authored by Nick Wunder, Marcus Schwarting, John Perkins, Robert White, Kristin Munch, and William Tumas, all from NREL. Tumas is director of the Center for Next Generation of Materials Design, an Energy Frontier Research Center funded by the Department of Energy, which is tasked with discovering new energy materials.
     
    In working on new materials, scientists synthesize many samples but only a fraction of what they learn along the way is ever published. Perkins, a senior scientist in the Materials Science Center, estimates that information about less than 10% of the samples makes it into a scientific journal. “You really only write journal articles about materials that worked,” he said, adding the information that wasn’t published also could be useful to research efforts.
     
    “If you wanted to know how electrically conductive a particular combination of chemical elements was before you actually made the material and measured it, you may be able to use the machine learning algorithm to predict that quantity,” said Phillips.
     
    The HTEM database draws from nearly a decade of thin-film experiments at NREL. Even data that was published, but not in a form that could be searched, was digitized and added to the database. “Once it’s all been amassed, it’s a non-trivial job to curate it and get it in a form where it can be analyzed and understood,” Phillips said, adding that this is where the future opportunities are.
     
    Now, Phillips, Perkins, and Zakutayev are participating in a collaborative effort between NREL and the National Institute of Standards and Technology to deploy a network of high-throughput experimental tools that would allow researchers to collaborate virtually on the synthesis and analysis of new materials, with results being added to databases like this. The pilot project has been dubbed the High-Throughput Experimental Materials Collaboratory.



    NREL’s HTEM Database group includes Andriy Zakutayev (left), Robert White, John Perkins, Marcus Schwarting, Caleb Phillips and Nick Wunder. (Photo by Dennis Schroeder/NREL)
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