Results 31 to 40 of about 24,150 (266)
Moiré excitons and exciton–polaritons: a review
Journal of Physics: Condensed MatterAbstract Distinguished by their long lifetimes, strong dipolar interactions, and periodic confinement, moiré excitons are fertile ground for realising interaction-driven excitonic phases beyond conventional semiconductor systems. Formed in twisted or lattice-mismatched van der Waals heterostructures, these excitons are shaped by a ...
Saúl A Herrera-González +4 more
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Exciton-exciton transitions involving strongly bound excitons: An ab initio approach
Physical Review B, 2023 In pump-probe spectroscopy, two laser pulses are employed to garner dynamical information from the sample of interest. The pump initiates the optical process by exciting a portion of the sample from the electronic ground state to an accessible electronic excited state, an exciton. Thereafter, the probe interacts with the already excited sample.
D. Sangalli +2 more
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Calculating curly arrows from ab initio wavefunctions
Nature Communications, 2018 Despite being essential to organic chemistry, the curly arrow notation of reaction mechanisms has been treated with suspicion due to its unclear connection with quantum mechanics.
Yu Liu +3 more
doaj +1 more source
Exciton–Exciton and Exciton–Photon Annihilation in Polaritonic Systems
The Journal of Physical Chemistry C8 pages, 4 ...
Luca Nils Philipp +2 more
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Near-field optical imaging and spectroscopy of 2D-TMDs
Nanophotonics, 2021 Two-dimensional transition metal dichalcogenides (2D-TMDs) are atomically thin semiconductors with a direct bandgap in monolayer thickness, providing ideal platforms for the development of exciton-based optoelectronic devices.
Kim Youngbum, Kim Jeongyong
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X‐Functionality–Driven Photocatalytic Hydrogen Evolution in 2D 4‐X‐PEA2SnI4 Perovskites
Advanced Functional Materials, EarlyView.We report a water‐based synthesis of 2D 4‐X‐PEA2SnI4 perovskite microcrystals with prominent photocatalytic (PC) activity for H2 production. The synergy between organic functionalization and HI‐derived iodide scavenges holes suppress octahedral distortion, and favor electron accumulation, enabling a PC H2 evolution ∼20 µmol·g−1 and long‐term stability ...
Taeyeon Kim +21 more
wiley +1 more source
Advanced Functional Materials, EarlyView.We report a unique color‐sensing phenomenon of a TiO2/SbSI:Sb2S3 device utilizing X‐ray absorption. Based on the revealed penetration and adsorption of water onto TiO2, we successfully improved the color response speed and sensitivity by incorporating a hydrophilic polymer interlayer, thereby opening up opportunities for photodetection applications ...
Tai Kobayashi +9 more
wiley +1 more source
Exciton dynamics in conjugated polymer systems
Frontiers in Physics, 2022 Exciton dynamics in π-conjugated polymers systems encompass multiple time and length scales. Ultrafast femtosecond processes are intrachain and involve a quantum mechanical correlation of the exciton and nuclear degrees of freedom.
William Barford, William Barford
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Indolo‐Fused MR‐TADF Materials and their Application in Organelle‐Targeted Bioimaging
Advanced Functional Materials, EarlyView.Using indolo‐fusion and sulfur bridging, four multi‐resonance thermally activated delayed fluorescent (MR‐TADF) materials are reported based on the quinolino[3,2,1‐de]acridine‐5,9‐dione (QAO) framework. Functionalization of these dyes with phosphonium groups enables cellular imaging with mitochondrial targeting in glassy organic nanoparticles ...
Sushil Sharma +5 more
wiley +1 more source
Linear scaling approach for optical excitations using maximally localized Wannier functions
JPhys Materials, 2023 We present a theoretical method for calculating optical absorption spectra based on maximally localized Wannier functions, which is suitable for large periodic systems.
Konrad Merkel, Frank Ortmann
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