Hélène Seiler
Fritz Haber Institute of the Max Planck Society
39 Papers
40 Citations
Hélène Seiler is an academic researcher from Fritz Haber Institute of the Max Planck Society. The author has contributed to research in topics: Femtosecond & Exciton. The author has an hindex of 9, co-authored 29 publications. Previous affiliations of Hélène Seiler include École Polytechnique Fédérale de Lausanne & Imperial College London.
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Papers
Two-dimensional electronic spectroscopy reveals liquid-like lineshape dynamics in CsPbI3 perovskite nanocrystals.
Hélène Seiler,Hélène Seiler,Samuel Palato,Samuel Palato,Colin Sonnichsen,Harry Baker,Etienne Socie,Etienne Socie,Dallas P. Strandell,Patanjali Kambhampati +9 more
TL;DR: Two-dimensional electronic spectroscopy is applied to probe the timescale and amplitude of the electronic gap correlations in CsPbI3 perovskite nanocrystals via homogeneous lineshape dynamics to reveal irreversible, diffusive dynamics that are qualitatively inconsistent with the coherent dynamics in covalent solids such as CdSe quantum dots.
Seeing Multiexcitons through Sample Inhomogeneity: Band-Edge Biexciton Structure in CdSe Nanocrystals Revealed by Two-Dimensional Electronic Spectroscopy.
TL;DR: It is shown that the band-edge biexciton structure must consist of a discrete manifold of electronic states that feature distinctive binding energies, which have direct implications for optical gain thresholds and efficiency droop in light-emitting devices and provide experimental measures of many-body physics in nanostructures.
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Nuclear dynamics of singlet exciton fission in pentacene single crystals.
Hélène Seiler,Marcin Krynski,Daniela Zahn,Sebastian Hammer,Yoav William Windsor,Thomas Vasileiadis,Jens Pflaum,Ralph Ernstorfer,Mariana Rossi,Mariana Rossi,Heinrich Schwoerer +10 more
TL;DR: In this paper, a femtosecond electron diffraction was used to directly observe the nuclear dynamics accompanying the Singlet exciton fission (SEF) process in single crystal pentacene using femto-condron diffraction.
Atomic fluctuations in electronic materials revealed by dephasing
TL;DR: Using a model with explicit atoms, it is demonstrated dephasing arises from atomic fluctuations intrinsic to the nanocrystal, which is contrary to predictions of the standard effective mass model for these materials, in which the exciton levels are strongly correlated through a common size dependence.
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Investigating the electronic structure of confined multiexcitons with nonlinear spectroscopies.
Samuel Palato,Hélène Seiler,Harry Baker,Colin Sonnichsen,Patrick J. Brosseau,Patanjali Kambhampati +5 more
TL;DR: This work reports on the investigation of the electronic structure of MX in colloidal CdSe QDs using time-resolved photoluminescence, state-resolving pump-probe, and two-dimensional spectroscopies and outlines the limits of the simple concept of binding energy.
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