DOI: https://doi.org/10.29363/nanoge.sdp.2022.003
Publication date: 13th June 2022
Hybrid materials are functional platforms that combine the synthetic control of molecular chemistry with the robust structural and electronic properties of crystalline inorganic solids. We utilize pressure to explore correlations between compression-induced structural changes and electronic properties in hybrid materials to direct our efforts in tuning these materials and synthesizing new variants. We examine these structure-property relationships using high-pressure X-ray diffraction, dc resistivity measurements, and absorption, vibrational, and photoluminescence spectroscopies. Two- and three-dimensional hybrid halide perovskites have emerged as versatile materials for energy storage and conversion, such as solar-cell absorbers, white-light phosphors, and battery electrodes. Through application of gigapascal-scale pressure to 2D copper chloride perovskites, we recently demonstrated the first instance of appreciable conductivity in a copper-chloride-based material. I will discuss how the pressure-driven structural evolution of copper halide perovskites results in dramatic piezochromism, increased conductivity, and the emergence of new electronic structures. In addition, I will demonstrate how we can then utilize chemical modification to bring this compression-induced conductivity within more technologically accessible pressures. I will end with a brief discussion of future pressure-related exploration within our new research group.
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International Conference on Hybrid and Organic Photovoltaics
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