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Tunable Interlayer Delocalization of Excitons in Layered Organic–Inorganic Halide Perovskites
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Lattice Distortion and Low-Frequency Anharmonic Phonons Suppress Charge Recombination in Lead Halide Perovskites upon Pseudohalide Doping: Time-Domain Ab Initio Analysis
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Insight into the Ionizing Surface Potential Method and Aqueous Sodium Halide Surfaces
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Thermal Decoherence of Superradiance in Lead Halide Perovskite Nanocrystal Superlattices
Recent experiments by Rainò et al. have documented cooperative emission from CsPbBr 3 nanocrystal superlattices, exhibiting the hallmarks of low-temperature superradiance. In particular, the optical response is coherent and the radiative decay rate is increased by a factor of 3, relative to that of individual nanocrystals. However, the increase is 6 orders of magnitude smaller than what is theoretically expected from the superradiance of large assemblies, consisting of 10 6 –10 8 interacting nanocrystals. In this report we develop a theoretical model of superradiance for such systems and show that thermal decoherence is largely responsible for the drastic reduction of the radiative decay rate in nanocrystal superlattices. Our theoretical approach explains the experimental results, provides insight into the design of small nanocrystal superlattices, and shows a 4 orders of magnitude enhancement in superradiant response. These quantitative predictions pave the path toward observing superradiance at higher temperatures.
A New Perspective and Design Principle for Halide Perovskites: Ionic Octahedron Network (ION)
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Dielectric Screening and Charge-Transfer in 2D Lead-Halide Perovskites for Reduced Exciton Binding Energies
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Spatially Resolved Anion Diffusion and Tunable Waveguides in Bismuth Halide Perovskites
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