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Title: Pressure-Dependent Light Emission of Charged and Neutral Excitons in Monolayer MoSe 2

Abstract

Tailoring the excitonic properties in two-dimensional monolayer transition metal dichalcogenides (TMDs) through strain engineering is an effective means to explore their potential applications in optoelectronics and nanoelectronics. Here we report pressure-tuned photon emission of trions and excitons in monolayer MoSe2 via a diamond anvil cell (DAC) through photoluminescence measurements and theoretical calculations. Under quasi-hydrostatic compressive strain, our results show neutral (X0) and charged (X–) exciton emission of monolayer MoSe2 can be effectively tuned by alcohol mixture vs inert argon pressure transmitting media (PTM). During this process, X– emission undergoes a continuous blue shift until reaching saturation, while X0 emission turns up splitting. The pressure-dependent charging effect observed in alcohol mixture PTM results in the increase of the X– exciton component and facilitates the pressure-tuned emission of X– excitons. This substantial tunability of X– and X0 excitons in MoSe2 can be extended to other 2D TMDs, which holds potential for developing strained and optical sensing devices.

Authors:
 [1]; ORCiD logo [1];  [2];  [1];  [1];  [1];  [1];  [1]; ORCiD logo [1]
  1. State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
  2. Department of Geological Sciences, The University of Texas at Austin, Austin, Texas 78712, United States
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Org.:
FOREIGN
OSTI Identifier:
1372920
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Physical Chemistry Letters; Journal Volume: 2017; Journal Issue: (8) ; 07, 2017
Country of Publication:
United States
Language:
ENGLISH
Subject:
36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Fu, Xinpeng, Li, Fangfei, Lin, Jung-Fu, Gong, Yuanbo, Huang, Xiaoli, Huang, Yanping, Han, Bo, Zhou, Qiang, and Cui, Tian. Pressure-Dependent Light Emission of Charged and Neutral Excitons in Monolayer MoSe 2. United States: N. p., 2017. Web. doi:10.1021/acs.jpclett.7b01374.
Fu, Xinpeng, Li, Fangfei, Lin, Jung-Fu, Gong, Yuanbo, Huang, Xiaoli, Huang, Yanping, Han, Bo, Zhou, Qiang, & Cui, Tian. Pressure-Dependent Light Emission of Charged and Neutral Excitons in Monolayer MoSe 2. United States. doi:10.1021/acs.jpclett.7b01374.
Fu, Xinpeng, Li, Fangfei, Lin, Jung-Fu, Gong, Yuanbo, Huang, Xiaoli, Huang, Yanping, Han, Bo, Zhou, Qiang, and Cui, Tian. Wed . "Pressure-Dependent Light Emission of Charged and Neutral Excitons in Monolayer MoSe 2". United States. doi:10.1021/acs.jpclett.7b01374.
@article{osti_1372920,
title = {Pressure-Dependent Light Emission of Charged and Neutral Excitons in Monolayer MoSe 2},
author = {Fu, Xinpeng and Li, Fangfei and Lin, Jung-Fu and Gong, Yuanbo and Huang, Xiaoli and Huang, Yanping and Han, Bo and Zhou, Qiang and Cui, Tian},
abstractNote = {Tailoring the excitonic properties in two-dimensional monolayer transition metal dichalcogenides (TMDs) through strain engineering is an effective means to explore their potential applications in optoelectronics and nanoelectronics. Here we report pressure-tuned photon emission of trions and excitons in monolayer MoSe2 via a diamond anvil cell (DAC) through photoluminescence measurements and theoretical calculations. Under quasi-hydrostatic compressive strain, our results show neutral (X0) and charged (X–) exciton emission of monolayer MoSe2 can be effectively tuned by alcohol mixture vs inert argon pressure transmitting media (PTM). During this process, X– emission undergoes a continuous blue shift until reaching saturation, while X0 emission turns up splitting. The pressure-dependent charging effect observed in alcohol mixture PTM results in the increase of the X– exciton component and facilitates the pressure-tuned emission of X– excitons. This substantial tunability of X– and X0 excitons in MoSe2 can be extended to other 2D TMDs, which holds potential for developing strained and optical sensing devices.},
doi = {10.1021/acs.jpclett.7b01374},
journal = {Journal of Physical Chemistry Letters},
number = (8) ; 07, 2017,
volume = 2017,
place = {United States},
year = {Wed Jul 19 00:00:00 EDT 2017},
month = {Wed Jul 19 00:00:00 EDT 2017}
}