Photoluminescence of freestanding single- and few-layerMoS2
By N. Scheuschner, O. Ochedowski, Anne-Marie Kaulitz, R. Gillen, M. Schleberger, J. Maultzsch. 2013
220 citations recorded by the source corpus.
We present a photoluminescence study of freestanding and Si/SiO2 supported single- and few-layer MoS2. The single-layer exciton peak (A) is only observed in freestanding MoS2. The photoluminescence of supported single-layer MoS2 is instead originating from the A- (trion) peak as the MoS2 is n-type doped from the substrate. In bilayer MoS2, the van der Waals interaction with the substrate is decreasing the indirect band gap energy by up to ~ 80 meV. Furthermore, the photoluminescence spectra of suspended MoS2 can be influenced by interference effects.
Subfields: Biomedical Engineering, Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/5f6aefea84c9e68dc4fe7566f5bb678e83bd1511
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In Biomedical Engineering
In Materials Chemistry
Citations in the corpus
- Thermal conductivity determination of suspended mono- and bilayer WS2 by Raman spectroscopy (2015, background): “Thus, the small shifts of (1)2g E ( ) and 1g A ( ) frequencies between suspended and supported samples possibly arise from the slight differences of charge carrier concentration, and biaxial strain [44, 45] caused by the substrate effect, respectively.”