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Lattice vibrations and dynamic disorder in two-dimensional hybrid lead-halide perovskites
Vlad Alexandru Dragomir, Stefanie Neutzner, Claudio Quarti +7
By means of non-resonant Raman spectroscopy and density functional theory calculations, we measure and assign the vibrational spectrum of two distinct two-dimensional lead-iodide p…
Ultrafast THz probe of photo-induced polarons in lead-halide perovskites
Eugenio Cinquanta, Daniele Meggiolaro, Silvia G. Motti +8
We study the nature of photo-excited charge carriers in CsPbBr3 nanocrystal thin films by ultrafast optical pump - THz probe spectroscopy. We observe a deviation from a pure Drude…
Broadband Defects Emission and Enhanced Ligand Raman Scattering in 0D Cs3Bi2I9 Colloidal Nanocrystals
Giuseppe M. Paterno', Nimai Mishra, Alex J. Barker +4
Excitonic 0D and 2D lead-halide perovskites have been recently developed and investigated as new materials for light generation. Here we report broadband (> 1 eV) emission from new…
Phonon coherences reveal the polaronic character of excitons in two-dimensional lead-halide perovskites
Félix Thouin, David A. Valverde Chávez, Claudio Quarti +6
Hybrid organic-inorganic semiconductors feature complex lattice dynamics due to the ionic character of the crystal and the softness arising from non-covalent bonds between molecula…
Exciton-polaron spectral structures in two dimensional hybrid lead-halide perovskites
Stefanie Neutzner, Félix Thouin, Daniele Cortecchia +3
Owing to both electronic and dielectric confinement effects, two-dimensional organic-inorganic hybrid perovskites sustain strongly bound excitons at room temperature. Here, we demo…