Unraveling the Disorder-Function Relationship in Organic-Inorganic Metal Halide Perovskites via Elastic Neutron Diffuse Scattering
We propose to characterize nanoscale structural defects in perovskite photovoltaic materials with the goal of gaining a fundamental understanding of how these defects affect optoelectronic properties. Unlike traditional semiconductors for photovoltaics which require a nearly perfect crystal structure, high-efficiency hybrid organic-inorganic metal halide perovskite semiconductors contain a high density of intrinsic static and dynamic defects. Local lattice distortions and structural heterogeneities which result from these defects interact with photo-induced excitations and govern ion migration. As a result, structural defects can be both beneficial and detrimental to the functionality and stability of hybrid perovskites; a full understanding of the relationship between defects and optoelectronic properties is lacking. In this proposal, we will utilize elastic neutron diffuse scattering techniques to characterize structural defects and ultimately connect the associated lattice distortions with optoelectronic properties of hybrid perovskite photovoltaics.
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STEINRUECK Hans-Georg; MAGERL Andreas; NEDER Reinhard; OULADDIAF Bachir; WEADOCK Nicholas and WILL Johannes. (2021). Unraveling the Disorder-Function Relationship in Organic-Inorganic Metal Halide Perovskites via Elastic Neutron Diffuse Scattering. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-14-269
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