Abstract
Molybdenum disulfide nanocrystals exhibit direct dependencies of the Raman peaks' intensities and their positions on the thicknesses of the nanocrystals. This indicates dependencies of the electronic structure on the thickness of the flakes, which scatter differently various laser wavelengths (473 nm, 532 nm and 633 nm). Pulsed cathodoluminescence spectra of MoS2 nanocrystals under the action of high-energy electron pulse show an increase in the luminescence intensities with the increasing input of electron energy densities, where higher electron densities induce greater amount of electron-holes, which afterwards recombining release the energy in the form of luminescence. Irradiation of nanocrystals at maximum electron energy density of 200 mJ cm−2 leads to a strong luminescence band at 655 nm (1.88 eV), which is explained by recombination of A exciton. The luminescence decay kinetics of the nanocrystals under the action of different electron energy densities is presented.
| Original language | English |
|---|---|
| Pages (from-to) | 529-532 |
| Number of pages | 4 |
| Journal | Journal of Luminescence |
| Volume | 188 |
| DOIs | |
| Publication status | Published - 1 Aug 2017 |
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Keywords
- Electron energy density
- Electron-holes
- MoS2
- Nanocrystal
- Nanopowder
- Pulsed cathodoluminescence
- Raman spectra
ASJC Scopus subject areas
- Biophysics
- Chemistry(all)
- Atomic and Molecular Physics, and Optics
- Biochemistry
- Condensed Matter Physics
Cite this
Pulsed cathodoluminescence and Raman spectra of MoS2 nanocrystals at different excitation electron energy densities and laser wavelengths. / Bozheyev, Farabi; Valiev, Damir; Nemkayeva, Renata.
In: Journal of Luminescence, Vol. 188, 01.08.2017, p. 529-532.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Pulsed cathodoluminescence and Raman spectra of MoS2 nanocrystals at different excitation electron energy densities and laser wavelengths
AU - Bozheyev, Farabi
AU - Valiev, Damir
AU - Nemkayeva, Renata
PY - 2017/8/1
Y1 - 2017/8/1
N2 - Molybdenum disulfide nanocrystals exhibit direct dependencies of the Raman peaks' intensities and their positions on the thicknesses of the nanocrystals. This indicates dependencies of the electronic structure on the thickness of the flakes, which scatter differently various laser wavelengths (473 nm, 532 nm and 633 nm). Pulsed cathodoluminescence spectra of MoS2 nanocrystals under the action of high-energy electron pulse show an increase in the luminescence intensities with the increasing input of electron energy densities, where higher electron densities induce greater amount of electron-holes, which afterwards recombining release the energy in the form of luminescence. Irradiation of nanocrystals at maximum electron energy density of 200 mJ cm−2 leads to a strong luminescence band at 655 nm (1.88 eV), which is explained by recombination of A exciton. The luminescence decay kinetics of the nanocrystals under the action of different electron energy densities is presented.
AB - Molybdenum disulfide nanocrystals exhibit direct dependencies of the Raman peaks' intensities and their positions on the thicknesses of the nanocrystals. This indicates dependencies of the electronic structure on the thickness of the flakes, which scatter differently various laser wavelengths (473 nm, 532 nm and 633 nm). Pulsed cathodoluminescence spectra of MoS2 nanocrystals under the action of high-energy electron pulse show an increase in the luminescence intensities with the increasing input of electron energy densities, where higher electron densities induce greater amount of electron-holes, which afterwards recombining release the energy in the form of luminescence. Irradiation of nanocrystals at maximum electron energy density of 200 mJ cm−2 leads to a strong luminescence band at 655 nm (1.88 eV), which is explained by recombination of A exciton. The luminescence decay kinetics of the nanocrystals under the action of different electron energy densities is presented.
KW - Electron energy density
KW - Electron-holes
KW - MoS2
KW - Nanocrystal
KW - Nanopowder
KW - Pulsed cathodoluminescence
KW - Raman spectra
UR - http://www.scopus.com/inward/record.url?scp=85028718829&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85028718829&partnerID=8YFLogxK
U2 - 10.1016/j.jlumin.2017.05.001
DO - 10.1016/j.jlumin.2017.05.001
M3 - Article
VL - 188
SP - 529
EP - 532
JO - Journal of Luminescence
JF - Journal of Luminescence
SN - 0022-2313
ER -