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Title: Observation of Excitonic Rydberg States in Monolayer MoS2 and WS2 by Photoluminescence Excitation Spectroscopy

Abstract

Here, we have identified excited exciton states in monolayers of MoS2 and WS2 supported on fused silica by means of photoluminescence excitation spectroscopy. In monolayer WS2, the positions of the excited A exciton states imply an exciton binding energy of 0.32 eV. In monolayer MoS2, excited exciton transitions are observed at energies of 2.24 and 2.34 eV. Assigning these states to the B exciton Rydberg series yields an exciton binding energy of 0.44 eV.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [2];  [1];  [1]
  1. Columbia Univ., New York, NY (United States)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
Research Org.:
Energy Frontier Research Centers (EFRC) (United States). Re-Defining Photovoltaic Efficiency Through Molecule Scale Control (RPEMSC)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences, and Biosciences Division; National Science Foundation (NSF); Keck Foundation; Alexander von Humboldt Foundation; Feodor Lynen Research Fellowship
OSTI Identifier:
1370381
Grant/Contract Number:  
SC0001085; DMR-1122594; DGE-1069240; AC02-98CH10886; AC05-06OR23100
Resource Type:
Accepted Manuscript
Journal Name:
Nano Letters
Additional Journal Information:
Journal Volume: 15; Journal Issue: 5; Related Information: RPEMSC partners with Columbia University (lead); Brookhaven National Laboratory; Purdue University; Journal ID: ISSN 1530-6984
Publisher:
American Chemical Society
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; transition metal dichalcogenides; molybdenum disulfide; tungsten disulfide; 2D materials; binding energy; excitons; monolayers; energy; phase transitions

Citation Formats

Hill, Heather M., Rigosi, Albert F., Roquelet, Cyrielle, Chernikov, Alexey, Berkelbach, Timothy C., Reichman, David R., Hybertsen, Mark S., Brus, Louis E., and Heinz, Tony F. Observation of Excitonic Rydberg States in Monolayer MoS2 and WS2 by Photoluminescence Excitation Spectroscopy. United States: N. p., 2015. Web. doi:10.1021/nl504868p.
Hill, Heather M., Rigosi, Albert F., Roquelet, Cyrielle, Chernikov, Alexey, Berkelbach, Timothy C., Reichman, David R., Hybertsen, Mark S., Brus, Louis E., & Heinz, Tony F. Observation of Excitonic Rydberg States in Monolayer MoS2 and WS2 by Photoluminescence Excitation Spectroscopy. United States. https://doi.org/10.1021/nl504868p
Hill, Heather M., Rigosi, Albert F., Roquelet, Cyrielle, Chernikov, Alexey, Berkelbach, Timothy C., Reichman, David R., Hybertsen, Mark S., Brus, Louis E., and Heinz, Tony F. Fri . "Observation of Excitonic Rydberg States in Monolayer MoS2 and WS2 by Photoluminescence Excitation Spectroscopy". United States. https://doi.org/10.1021/nl504868p. https://www.osti.gov/servlets/purl/1370381.
@article{osti_1370381,
title = {Observation of Excitonic Rydberg States in Monolayer MoS2 and WS2 by Photoluminescence Excitation Spectroscopy},
author = {Hill, Heather M. and Rigosi, Albert F. and Roquelet, Cyrielle and Chernikov, Alexey and Berkelbach, Timothy C. and Reichman, David R. and Hybertsen, Mark S. and Brus, Louis E. and Heinz, Tony F.},
abstractNote = {Here, we have identified excited exciton states in monolayers of MoS2 and WS2 supported on fused silica by means of photoluminescence excitation spectroscopy. In monolayer WS2, the positions of the excited A exciton states imply an exciton binding energy of 0.32 eV. In monolayer MoS2, excited exciton transitions are observed at energies of 2.24 and 2.34 eV. Assigning these states to the B exciton Rydberg series yields an exciton binding energy of 0.44 eV.},
doi = {10.1021/nl504868p},
journal = {Nano Letters},
number = 5,
volume = 15,
place = {United States},
year = {Fri Mar 27 00:00:00 EDT 2015},
month = {Fri Mar 27 00:00:00 EDT 2015}
}

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Cited by: 280 works
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