scholarly journals Theory of exciton dynamics in time-resolved ARPES: Intra- and intervalley scattering in two-dimensional semiconductors

2019 ◽  
Vol 100 (20) ◽  
Author(s):  
Dominik Christiansen ◽  
Malte Selig ◽  
Ermin Malic ◽  
Ralph Ernstorfer ◽  
Andreas Knorr
Keyword(s):  
Two Dimensional ◽  
Time Resolved ◽  
Exciton Dynamics ◽  
Intervalley Scattering

Exciton dynamics and annihilation in WS2 2D semiconductors

Nanoscale ◽  
2015 ◽  
Vol 7 (16) ◽  
pp. 7402-7408 ◽  
Author(s):  
Long Yuan ◽  
Libai Huang
Keyword(s):  
Two Dimensional ◽  
Time Resolved ◽  
Exciton Dynamics ◽  
2D Semiconductors ◽  
Time Resolved Photoluminescence ◽  
2D Crystals

We systematically investigate the exciton dynamics in monolayered, bilayered, and trilayered WS2 two-dimensional (2D) crystals by time-resolved photoluminescence (TRPL) spectroscopy.

Femtosecond time-resolved exciton dynamics in CdSe

1984 ◽  
Vol 49 (6) ◽  
pp. 605-609 ◽  
Author(s):  
J.G. Fujimoto ◽  
S.G. Shevel ◽  
E.P. Ippen
Keyword(s):  
Time Resolved ◽  
Exciton Dynamics

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>

Time-resolved photoluminescence studies of stimulated emission and exciton dynamics in ZnSe/ZnS0.18Se0.82 superlattices

1994 ◽  
Vol 37 (4-6) ◽  
pp. 1133-1136
Author(s):  
C.J. Stevens ◽  
R.A. Taylor ◽  
J.F. Ryan ◽  
M. Dabbicco ◽  
M. Ferrara ◽  
...  
Keyword(s):  
Stimulated Emission ◽  
Time Resolved ◽  
Exciton Dynamics ◽  
Photoluminescence Studies ◽  
Time Resolved Photoluminescence

Two-dimensional camera for millisecond range time-resolved small- and wide-angle X-ray scattering

2003 ◽  
Vol 36 (3) ◽  
pp. 809-811 ◽  
Author(s):  
Volker Urban ◽  
Pierre Panine ◽  
Cyril Ponchut ◽  
Peter Boesecke ◽  
Theyencheri Narayanan
Keyword(s):  
Wide Angle ◽  
Two Dimensional ◽  
Time Resolved ◽  
X Ray ◽  
X Ray Scattering ◽  
Millisecond Range ◽  
Ray Scattering

scholarly journals Exciton dynamics in two-dimensional MoS2 on a hyperbolic metamaterial-based nanophotonic platform

2020 ◽  
Vol 101 (4) ◽  
Author(s):  
Kwang Jin Lee ◽  
Wei Xin ◽  
Chunhao Fann ◽  
Xinli Ma ◽  
Fei Xing ◽  
...  
Keyword(s):  
Two Dimensional ◽  
Exciton Dynamics ◽  
Hyperbolic Metamaterial
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