Results 11 to 20 of about 103,476 (250)
Exciton–Exciton Annihilation as a Probe of Exciton Diffusion in Large Porphyrin Nanorings [PDF]
The Journal of Physical Chemistry C, 2020 The photophysical behavior of natural and artificial cyclic supramolecular structures has been intensively investigated in the past decade.
Giovanni Bressan +4 more
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The Effect of the Exciton Continuum on the Exciton–Exciton Correlation [PDF]
physica status solidi (a), 2000 We present a numeric calculation of the exciton-exciton correlation for a one-dimensional semiconductor model with long-range Coulomb interactions, taking into account the effect of the effect of the exciton continuum. we use the obtained correlation functions to calculate the time integrated intensity of the four wave mixing signal.
MARTINO, Giovanna +2 more
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Direct observation of exciton–exciton interactions [PDF]
Nature Communications, 2018 AbstractNatural light harvesting as well as optoelectronic and photovoltaic devices depend on efficient transport of energy following photoexcitation. Using common spectroscopic methods, however, it is challenging to discriminate one-exciton dynamics from multi-exciton interactions that arise when more than one excitation is present in the system. Here
Jakub Dostál +5 more
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Exciton-exciton and exciton–charge carrier interaction and exciton collisional broadening in GaAs/AlGaAs quantum wells [PDF]
Physical Review B, 2021 Wave functions of heavy-hole excitons in GaAs/Al$_{0.3}$Ga$_{0.7}$As square quantum wells (QWs) of various widths are calculated by the direct numerical solution of a three-dimensional Schrödinger equation using a finite-difference scheme. These wave functions are then used to determine the exciton-exciton, exciton-electron and exciton-hole fermion ...
B. F. Gribakin +3 more
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Exciton-exciton annihilation in hBN [PDF]
Applied Physics Letters, 2019 Known as a prominent recombination path at high excitation densities, exciton-exciton annihilation (EEA) is evidenced in bulk hexagonal boron nitride by cathodoluminescence at low temperature. Thanks to a careful tuning of the exciton density by varying either the current or the focus of the incident electron beam, we could estimate an EEA rate of 2 ...
A. Plaud +7 more
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Exciton transport in amorphous polymers and the role of morphology and thermalisation
New Journal of Physics, 2021 Understanding the transport mechanism of electronic excitations in conjugated polymers is key to advancing organic optoelectronic applications, such as solar cells, organic light-emitting diodes and flexible electronics. While crystalline polymers can be
Francesco Campaioli, Jared H Cole
doaj +1 more source
Nanomaterials, 2023 The current work used the effective mass approximation conjoined with the finite element method to study the exciton states in a conical GaAs quantum dot.
Sargis P. Gavalajyan +6 more
doaj +1 more source
Exciton percolation and exciton coherence [PDF]
The Journal of Chemical Physics, 1977 Peer Reviewed ; http://deepblue.lib.umich.edu/bitstream/2027.42/69756/2/JCPSA6-66-7-3301-1 ...
Argyrakis, Panos, Kopelman, Raoul
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Intrinsic Exciton Linewidth in Monolayer Transition Metal Dichalcogenides [PDF]
, 2014 Monolayer transition metal dichalcogenides feature Coulomb-bound electron-hole pairs (excitons) with exceptionally large binding energy and coupled spin and valley degrees of freedom. These unique attributes have been leveraged for electrical and optical
Bergauser, Gunnar +12 more
core +2 more sources
First-principles method of propagation of tightly bound excitons: exciton band structure of LiF and verification with inelastic x-ray scattering [PDF]
, 2013 We propose a simple first-principles method to describe propagation of tightly bound excitons. By viewing the exciton as a composite object (an effective Frenkel exciton in Wannier orbitals), we define an exciton kinetic kernel to encapsulate the exciton
Chen-Lin Yeh +7 more
core +2 more sources