Exciton Dynamics, Transport, and Annihilation in Atomically Thin Two-Dimensional Semiconductors

2017 ◽  
Vol 8 (14) ◽  
pp. 3371-3379 ◽  
Author(s):  
Long Yuan ◽  
Ti Wang ◽  
Tong Zhu ◽  
Mingwei Zhou ◽  
Libai Huang
Keyword(s):  
Two Dimensional ◽  
Exciton Dynamics

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.

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>

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

scholarly journals Two-Dimensional Near Ultraviolet (2DNUV) Spectroscopic Probe of Structural-Dependent Exciton Dynamics in a Protein

2015 ◽  
Vol 119 (4) ◽  
pp. 1314-1322 ◽  
Author(s):  
Jun Li ◽  
Mingsen Deng ◽  
Dmitri V. Voronine ◽  
Shaul Mukamel ◽  
Jun Jiang
Keyword(s):  
Two Dimensional ◽  
Exciton Dynamics ◽  
Near Ultraviolet ◽  
Spectroscopic Probe

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

Large Exciton Diffusion Coefficients in Two-Dimensional Covalent Organic Frameworks with Different Domain Sizes Revealed by Ultrafast Exciton Dynamics

2020 ◽  
Vol 142 (35) ◽  
pp. 14957-14965 ◽  
Author(s):  
Nathan C. Flanders ◽  
Matthew S. Kirschner ◽  
Pyosang Kim ◽  
Thomas J. Fauvell ◽  
Austin M. Evans ◽  
...  
Keyword(s):  
Diffusion Coefficients ◽  
Two Dimensional ◽  
Covalent Organic Frameworks ◽  
Exciton Dynamics ◽  
Exciton Diffusion

Two‐dimensional exciton dynamics in InGaAs/GaAs quantum wells

1992 ◽  
Vol 60 (2) ◽  
pp. 213-215 ◽  
Author(s):  
Yutaka Takahashi ◽  
Soichi Owa ◽  
Satoru S. Kano ◽  
Koji Muraki ◽  
Susumi Fukatsu ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Two Dimensional ◽  
Exciton Dynamics

scholarly journals Exciton dynamics and non-linearities in two-dimensional hybrid organic perovskites

2016 ◽  
Vol 119 (6) ◽  
pp. 064301 ◽  
Author(s):  
K. Abdel-Baki ◽  
F. Boitier ◽  
H. Diab ◽  
G. Lanty ◽  
K. Jemli ◽  
...  
Keyword(s):  
Two Dimensional ◽  
Exciton Dynamics
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