Please use this identifier to cite or link to this item: https://doi.org/10.1021/nn4046002
Title: Nonblinking, intense two-dimensional light emitter: Monolayer WS 2 Triangles
Authors: Peimyoo, N.
Shang, J.
Cong, C.
Shen, X.
Wu, X.
Yeow, E.K.L.
Yu, T. 
Keywords: CVD
microspectroscopy
photoluminescence
temperature dependence
WS2
Issue Date: 23-Dec-2013
Citation: Peimyoo, N., Shang, J., Cong, C., Shen, X., Wu, X., Yeow, E.K.L., Yu, T. (2013-12-23). Nonblinking, intense two-dimensional light emitter: Monolayer WS 2 Triangles. ACS Nano 7 (12) : 10985-10994. ScholarBank@NUS Repository. https://doi.org/10.1021/nn4046002
Abstract: Monolayer WS2 (1L-WS2), with a direct band gap, provides an ideal platform to investigate unique properties of two-dimensional semiconductors. In this work, light emission of a 1L-WS2 triangle has been studied by using steady-state, time-resolved, and temperature-dependent photoluminescence (PL) spectroscopy. Two groups of 1L-WS2 triangles have been grown by chemical vapor deposition, which exhibit nonuniform and uniform PL, respectively. Observed nonuniform PL features, i.e., quenching and blue-shift in certain areas, are caused by structural imperfection and n-doping induced by charged defects. Uniform PL is found to be intrinsic, intense, and nonblinking, which are attributed to high crystalline quality. The binding energy of the A-exciton is extracted experimentally, which gives direct evidence for the large excitonic effect in 1L-WS2. These superior photon emission features make 1L-WS2 an appealing material for optoelectronic applications such as novel light-emitting and biosensing devices. © 2013 American Chemical Society.
Source Title: ACS Nano
URI: http://scholarbank.nus.edu.sg/handle/10635/97331
ISSN: 19360851
DOI: 10.1021/nn4046002
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

151
checked on Oct 18, 2018

WEB OF SCIENCETM
Citations

143
checked on Oct 2, 2018

Page view(s)

31
checked on Oct 19, 2018

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.