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Phonon-Mediated Attractive Interactions between Excitons in Lead-Halide-Perovskites
(2022)arXivUnderstanding the origin of electron-phonon coupling in lead-halide perovskites (LHP) is key to interpreting and leveraging their optical and electronic properties. Here we perform femtosecond-resolved, optical-pump, electron-diffraction-probe measurements to quantify the lattice reorganization occurring as a result of photoexcitation in LHP nanocrystals. Photoexcitation is found to drive a reduction in lead-halide octahedra tilts and ...Working Paper -
Colloidal aziridinium lead bromide quantum dots
(2023)Research SquareThe compositional engineering of lead-halide perovskite nanocrystals (NCs) via the A-site cation represents a lever to fine-tune their structural and electronic properties. However, the presently available chemical space remains minimal since, thus far, only three A-site cations have been reported to favor the formation of stable lead-halide perovskite NCs, i.e., Cs⁺ , formamidinium (FA), and methylammonium (MA). Inspired by recent reports ...Working Paper