scholarly journals Erratum: Coherence in singlet-exciton motion in anthracene crystals [Phys. Rev. B31, 2430 (1985)]

1986 ◽  
Vol 34 (12) ◽  
pp. 8975-8975
Author(s):  
V. M. Kenkre ◽  
D. Schmid
Keyword(s):  
Singlet Exciton

scholarly journals Probing the interplay between lattice dynamics and short-range magnetic correlations in CuGeO3 with femtosecond RIXS

2021 ◽  
Vol 6 (1) ◽  
Author(s):  
E. Paris ◽  
C. W. Nicholson ◽  
S. Johnston ◽  
Y. Tseng ◽  
M. Rumo ◽  
...  
Keyword(s):  
Short Range ◽  
Degrees Of Freedom ◽  
Time Resolved ◽  
Model Calculations ◽  
Spin Correlations ◽  
Singlet Exciton ◽  
Magnetic Correlations ◽  
Local Lattice ◽  
Frustrated Systems ◽  
A Charge

AbstractInvestigations of magnetically ordered phases on the femtosecond timescale have provided significant insights into the influence of charge and lattice degrees of freedom on the magnetic sub-system. However, short-range magnetic correlations occurring in the absence of long-range order, for example in spin-frustrated systems, are inaccessible to many ultrafast techniques. Here, we show how time-resolved resonant inelastic X-ray scattering (trRIXS) is capable of probing such short-ranged magnetic dynamics in a charge-transfer insulator through the detection of a Zhang–Rice singlet exciton. Utilizing trRIXS measurements at the O K-edge, and in combination with model calculations, we probe the short-range spin correlations in the frustrated spin chain material CuGeO3 following photo-excitation, revealing a strong coupling between the local lattice and spin sub-systems.

High Yield Ultrafast Intramolecular Singlet Exciton Fission in a Quinoidal Bithiophene

2015 ◽  
Vol 6 (8) ◽  
pp. 1375-1384 ◽  
Author(s):  
Oleg Varnavski ◽  
Neranga Abeyasinghe ◽  
Juan Aragó ◽  
Juan J. Serrano-Pérez ◽  
Enrique Ortí ◽  
...  
Keyword(s):  
High Yield ◽  
Singlet Exciton ◽  
Singlet Exciton Fission

Effect of silver nanoparticle on singlet exciton fission in rubrene films

2017 ◽  
Vol 654 (1) ◽  
pp. 209-213 ◽  
Author(s):  
Hiroaki Yonemura ◽  
Yuko Futaoka ◽  
Tatsuya Taniguchi ◽  
Hiroshi Sakaguchi ◽  
Sunao Yamada
Keyword(s):  
Silver Nanoparticle ◽  
Singlet Exciton ◽  
Singlet Exciton Fission

scholarly journals Slow light enhanced singlet exciton fission solar cells with a 126% yield of electrons per photon

2013 ◽  
Vol 103 (26) ◽  
pp. 263302 ◽  
Author(s):  
Nicholas J. Thompson ◽  
Daniel N. Congreve ◽  
David Goldberg ◽  
Vinod M. Menon ◽  
Marc A. Baldo
Keyword(s):  
Solar Cells ◽  
Slow Light ◽  
Singlet Exciton ◽  
Singlet Exciton Fission

scholarly journals Recent Progress in Singlet Exciton Fission

2016 ◽  
Vol 32 (8) ◽  
pp. 1880-1893
Author(s):  
Yan-Ping LIU ◽  
◽  
Yi-Shi WU ◽  
Hong-Bing FU ◽  
◽  
...  
Keyword(s):  
Recent Progress ◽  
Singlet Exciton ◽  
Singlet Exciton Fission

scholarly journals Geometries and Terahertz Motions Driving Quintet Multiexcitons and Ultimate Triplet-Triplet Dissociations via the Intramolecular Singlet-Fissions

2020 ◽  
Author(s):  
Yasuhiro Kobori ◽  
Masaaki Fuki ◽  
Shunta Nakamura ◽  
Taku Hasobe
Keyword(s):  
Molecular Mechanisms ◽  
Molecular Conformation ◽  
High Energy ◽  
Strongly Correlated ◽  
Spin Conversion ◽  
Paramagnetic Resonance ◽  
Time Resolved ◽  
Strongly Coupled ◽  
Singlet Exciton ◽  
Spin Distributions

Importance of vibronic effects has been highlighted for the singlet-fission (SF) that convert one high-energy singlet exciton into doubled triplet excitons, as strongly correlated multiexcitons. However, molecular mechanisms of spin conversion processes and ultimate de-couplings in the multiexcitons are poorly understood. We have analyzed geometries and exchange couplings of the photoinduced multiexcitons in the pentacene dimers bridged by a phenylene at ortho and meta positions [denoted as <i>o</i>-(Pc)<sub>2</sub> and <i>m</i>-(Pc)<sub>2</sub>] by simulations of the time-resolved electron paramagnetic resonance spectra. We clarified that terahertz molecular conformation dynamics plays a role on the spin conversion from the singlet strongly coupled multiexcitons <sup>1</sup>(TT) to the quintet state <sup>5</sup>(TT). The strongly coupled <sup>5</sup>(TT) multiexcitons are revealed to possess entirely planar conformations stabilized by mutually delocalized spin distributions, while the intramolecular de-coupled spin-correlated triplet pairs generated at 1 microsecond are also stabilized by distorted conformations resulting in two separately localized biradical characters.

scholarly journals Ultrafast Exciton Dynamics in Two Dimensional Covalent Organic Frameworks Reveals Size Dependence to Exciton Diffusion

2020 ◽  
Author(s):  
Nathan C. Flanders ◽  
Matthew S. Kirschner ◽  
Pyosang Kim ◽  
Thomas Fauvell ◽  
Austin Evans ◽  
...  
Keyword(s):  
High Performance ◽  
Transient Absorption ◽  
Domain Size ◽  
Spectroscopic Techniques ◽  
Two Dimensional ◽  
Exciton Dynamics ◽  
Singlet Exciton ◽  
Exciton Diffusion ◽  
Absorption Studies ◽  
Exciton Annihilation

<p>Large singlet exciton diffusion lengths are a hallmark of high performance in organic based devices such as photovoltaics, chemical sensors, and photodetectors. In this study, exciton dynamics of a two-dimensional covalent organic framework, COF- 5, is investigated using ultrafast spectroscopic techniques. Following photoexcitation, the COF-5 exciton decays via three pathways: 1) excimer formation (4 ± 2 ps), 2) excimer relaxation (160 ± 40 ps), and 3) excimer decay (>3 ns). Excitation fluence-dependent transient absorption studies suggest that COF-5 has a relatively large diffusion coefficient (0.08 cm2/s). Furthermore, exciton-exciton annihilation processes are characterized as a function of COF-5 crystallite domain size in four different samples, which reveal domain- size dependent exciton diffusion kinetics. These results reveal that exciton diffusion in COF-5 is constrained by its crystalline domain size. These insights indicate the outstanding promise of delocalized excitonic processes available in 2D COFs, which motivate their continued design and implementation into optoelectronic devices. </p>

Modeling temperature dependent singlet exciton dynamics in multilayered organic nanofibers

2018 ◽  
Vol 148 (20) ◽  
pp. 204101 ◽  
Author(s):  
Leonardo Evaristo de Sousa ◽  
Pedro Henrique de Oliveira Neto ◽  
Jakob Kjelstrup-Hansen ◽  
Demétrio Antônio da Silva Filho
Keyword(s):  
Temperature Dependent ◽  
Exciton Dynamics ◽  
Singlet Exciton
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