منابع مشابه
Charge carrier mobility in hybrid halide perovskites
The charge transport properties of hybrid halide perovskites are investigated with a combination of density functional theory including van der Waals interaction and the Boltzmann theory for diffusive transport in the relaxation time approximation. We find the mobility of electrons to be in the range 5-10 cm(2)V(-1)s(-1) and that for holes within 1-5 cm(2)V(-1)s(-1), where the variations depend...
متن کاملAtomic Resolution Imaging of Halide Perovskites.
The radiation-sensitive nature of halide perovskites has hindered structural studies at the atomic scale. We overcome this obstacle by applying low dose-rate in-line holography, which combines aberration-corrected high-resolution transmission electron microscopy with exit-wave reconstruction. This technique successfully yields the genuine atomic structure of ultrathin two-dimensional CsPbBr3 ha...
متن کاملLarge polarons in lead halide perovskites
Lead halide perovskites show marked defect tolerance responsible for their excellent optoelectronic properties. These properties might be explained by the formation of large polarons, but how they are formed and whether organic cations are essential remain open questions. We provide a direct time domain view of large polaron formation in single-crystal lead bromide perovskites CH3NH3PbBr3 and C...
متن کاملCan Pb-Free Halide Double Perovskites Support High-Efficiency Solar Cells?
The methylammonium lead halides have become champion photoactive semiconductors for solar cell applications; however, issues still remain with respect to chemical instability and potential toxicity. Recently, the Cs2AgBiX6 (X = Cl, Br) double perovskite family has been synthesized and investigated as stable nontoxic replacements. We probe the chemical bonding, physical properties, and cation an...
متن کاملSupplementary Information for Atomic Resolution Imaging of Halide Perovskites
Department of Chemistry, University of California, Berkeley, CA 94720, USA. Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA. The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA. Kavli Energy NanoScience Institute, Berkeley, California 94720, USA. Department of Materials Science and Engineering, University of Californi...
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ژورنال
عنوان ژورنال: Angewandte Chemie International Edition
سال: 2018
ISSN: 1433-7851,1521-3773
DOI: 10.1002/anie.201807421