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Published March 2015 | public
Journal Article Open

Colorimetric Screening for High-Throughput Discovery of Light Absorbers


High-throughput screening is a powerful approach for identifying new functional materials in unexplored material spaces. With library synthesis capable of producing 10^5 to 10^6 samples per day, methods for material screening at rates greater than 1 Hz must be developed. For the discovery of new solar light absorbers, this throughput cannot be attained using standard instrumentation. Screening certain properties, such as the bandgap, are of interest only for phase pure materials, which comprise a small fraction of the samples in a typical solid-state material library. We demonstrate the utility of colorimetric screening based on processing photoscanned images of combinatorial libraries to quickly identify distinct phase regions, isolate samples with desired bandgap, and qualitatively identify samples that are suitable for complementary measurements. Using multiple quaternary oxide libraries containing thousands of materials, we compare colorimetric screening and UV–vis spectroscopy results, demonstrating successful identification of compounds with bandgap suitable for solar applications.

Additional Information

© 2014 American Chemical Society. Received: October 2, 2014; revised: December 9, 2014. Published: December 30, 2014. The authors thank Ryan J. R. Jones for assistance with the experiments. This manuscript is based upon work performed by the Joint Center for Artificial Photosynthesis, a DOE Energy Innovation Hub, supported through the Office of Science of the U.S. Department of Energy (award no. DE-SC0004993).

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Supplemental Material - co500151u_si_001.pdf


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August 22, 2023
August 22, 2023