Investigating the role of dark excitons on electron-hole liquid photoluminescence in monolayer transition-metal dichalcogenides

2021 ◽  
Author(s):  
Ryan Wilmington ◽  
Hossein Ardekani ◽  
Avinash Rustagi ◽  
Alexander Bataller ◽  
Alexander F. Kemper ◽  
...  
Keyword(s):  
Transition Metal ◽  
Transition Metal Dichalcogenides ◽  
Electron Hole ◽  
Metal Dichalcogenides

Phonon Coupling and Dielectric Response in 2D Semiconductor

NANO ◽  
2021 ◽  
Author(s):  
Arslan Usman ◽  
Abdul Sattar ◽  
Hamid Latif ◽  
Muhammad Imran
Keyword(s):  
Transition Metal Dichalcogenides ◽  
Coupling Mechanism ◽  
Two Dimensional ◽  
Electron Hole ◽  
Exciton Coupling ◽  
Gain Energy ◽  
Metal Dichalcogenides ◽  
Layered Transition Metal ◽  
The Impact

The impact of phonon and their surrounding environment on exciton and its complexes were investigated in monolayer WSe2 semiconductor. Phonon up-conversion has been studied in past for conventional III–V semiconductors, but its role in two-dimensional layered transition metal dichalcogenides has rarely been explored. We investigated the photoluminescence up-conversion mechanism in WSe2 monolayer and found that a lower energy photon gain energy upto 64[Formula: see text]meV to be up-converted to emission photon at room temperature. Moreover, the phonon-exciton coupling mechanism has also been investigated and the role of dielectric screening has been explored to get complete insight of coulomb’s interaction in these electron-hole pairs. Investigations of charge carrier’s lifetime reveal that boron nitride encapsulated monolayer has shorter recombination time as low as 41 ps as compared to a bare monolayer on SiO2 substrate. These results are very promising for realizing spintronics-based application from two-dimensional layered semiconductors.

The role of electron-phonon interactions on the coherence lifetime of monolayer transition metal dichalcogenides

2017 ◽  
Vol 266 ◽  
pp. 30-33
Author(s):  
C.E. Stevens ◽  
P. Dey ◽  
J. Paul ◽  
Z. Wang ◽  
H. Zhang ◽  
...  
Keyword(s):  
Transition Metal ◽  
Transition Metal Dichalcogenides ◽  
Metal Dichalcogenides

Electron-hole plasma formation dynamics observed through exciton-plasma interactions in transition metal dichalcogenides

2021 ◽  
Vol 104 (7) ◽  
Author(s):  
Manobina Karmakar ◽  
Subhrajit Mukherjee ◽  
Samit K. Ray ◽  
Prasanta Kumar Datta
Keyword(s):  
Transition Metal ◽  
Transition Metal Dichalcogenides ◽  
Plasma Formation ◽  
Electron Hole ◽  
Plasma Interactions ◽  
Hole Plasma ◽  
Electron Hole Plasma ◽  
Formation Dynamics ◽  
Metal Dichalcogenides

scholarly journals Prediction of the structural and electronic properties of MoxTi1−xS2 monolayers via first principle simulations

2020 ◽  
Vol 10 ◽  
pp. 184798042095509
Author(s):  
Ankit Kumar Verma ◽  
Federico Raffone ◽  
Giancarlo Cicero
Keyword(s):  
Transition Metal ◽  
Electronic Properties ◽  
Transition Metal Dichalcogenides ◽  
Stable Phase ◽  
Two Dimensional ◽  
Electron Hole ◽  
Effective Electron ◽  
Wide Range ◽  
Structural And Electronic Properties ◽  
Metal Dichalcogenides

Two-dimensional transition metal dichalcogenides have gained great attention because of their peculiar physical properties that make them interesting for a wide range of applications. Lately, alloying between different transition metal dichalcogenides has been proposed as an approach to control two-dimensional phase stability and to obtain compounds with tailored characteristics. In this theoretical study, we predict the phase diagram and the electronic properties of Mo xTi1− xS2 at varying stoichiometry and show how the material is metallic, when titanium is the predominant species, while it behaves as a p-doped semiconductor, when approaching pure MoS2 composition. Correspondingly, the thermodynamically most stable phase switches from the tetragonal to the hexagonal one. Further, we present an example which shows how the proposed alloys can be used to obtain new vertical two-dimensional heterostructures achieving effective electron/hole separation.

Ballistic thermal transport in monolayer transition-metal dichalcogenides: Role of atomic mass

2016 ◽  
Vol 108 (8) ◽  
pp. 082102 ◽  
Author(s):  
Jinlong Ma ◽  
Wu Li ◽  
Xiaobing Luo
Keyword(s):  
Transition Metal ◽  
Thermal Transport ◽  
Transition Metal Dichalcogenides ◽  
Atomic Mass ◽  
Metal Dichalcogenides

scholarly journals Nanoscale Friction Behavior of Transition-Metal Dichalcogenides: Role of the Chalcogenide

ACS Nano ◽  
2020 ◽  
Vol 14 (11) ◽  
pp. 16013-16021 ◽  
Author(s):  
Mohammad R. Vazirisereshk ◽  
Kathryn Hasz ◽  
Meng-Qiang Zhao ◽  
A. T. Charlie Johnson ◽  
Robert W. Carpick ◽  
...  
Keyword(s):  
Transition Metal ◽  
Transition Metal Dichalcogenides ◽  
Friction Behavior ◽  
Nanoscale Friction ◽  
Metal Dichalcogenides

Role of graphene and transition metal dichalcogenides as hole transport layer and counter electrode in solar cells

2019 ◽  
Vol 44 (3) ◽  
pp. 1464-1487 ◽  
Author(s):  
Muhammad Zahir Iqbal ◽  
Jameel‐Un Nabi ◽  
Saman Siddique ◽  
Hafiz Taimoor Ahmed Awan ◽  
Syed Shabhi Haider ◽  
...  
Keyword(s):  
Solar Cells ◽  
Transition Metal ◽  
Counter Electrode ◽  
Transition Metal Dichalcogenides ◽  
Hole Transport ◽  
Transport Layer ◽  
Hole Transport Layer ◽  
Metal Dichalcogenides

An origin of unintentional doping in transition metal dichalcogenides: the role of hydrogen impurities

Nanoscale ◽  
2017 ◽  
Vol 9 (12) ◽  
pp. 4265-4271 ◽  
Author(s):  
Youngho Kang ◽  
Seungwu Han
Keyword(s):  
Transition Metal ◽  
Transition Metal Dichalcogenides ◽  
Unintentional Doping ◽  
Metal Dichalcogenides
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