Sep 1, 2020 · We have investigated the static and dynamic photoluminescence (PL) of monolayer molybdenum disulfide (MoS 2) from low-temperature (4 K) to room temperature (300 K). Free excitons (A excitons) and bound excitons (X L excitons) can be …

The PL spectra of the MoS 2 shows a typical PL curve for CVD-grown monolayer MoS 2 with one broad peak at 684 nm, corresponding to direct-gap optical transitions of MoS 2 (1.81 eV)...

Mar 13, 2017 · English: Photoluminescence (PL) of a MoS2 monolayer at 4 K excited by a σ+ polarized laser. The monolayer absorbs the incident light and re-emits it at lower energy. The energy of the peak center correspond to the optical gap.

Jul 1, 2018 · Low-temperature photoluminescence (PL) properties of monolayer MoS 2 on diverse substrates are primarily studied. As the temperature increases, a decrease in PL intensity and a red shift in PL wavelength are observed.

The MoS2@MoO3 gas sensors display a p-type-like response towards NO2 with a detection limit of 0.15 ppm at a working temperature of 125 °C, as well as superb selectivity and reversibility.

Nov 12, 2013 · We demonstrate the tunability of the photoluminescence (PL) properties of monolayer (1L)-MoS 2 via chemical doping. The PL intensity of 1L-MoS 2 was drastically enhanced by the adsorption of p-type dopants with high electron affinity but reduced by the adsorption of n-type dopants.

Aug 1, 2019 · Atomically thin molybdenum disulfide (MoS 2) has been treated as a promising optoelectronic material, due to its strong photoluminescence (PL) emission. Here, we demonstrate the tunability of the PL properties of bilayer MoS 2 through interlayer twist.

Feb 12, 2015 · We investigate valley exciton dynamics in MoSe2 monolayers in polarization- and time-resolved photoluminescence (PL) spectroscopy at 4K. Following circularly polarized laser excitation, we record a low circular polarization degree of the PL of typically ≤ 5%.

We demonstrate the tunability of the photoluminescence (PL) properties of monolayer (1L)-MoS2 via chemical doping. The PL intensity of 1L-MoS2 was drastically enhanced by the adsorption of p-type dopants with high electron affinity, but reduced by the adsorption of n-type dopants.

Our results provide insights into how excitonic and defect-mediated PL emissions in MoS2 are influenced by sulfur vacancies at room and low temperatures.

Aug 16, 2013 · We demonstrate the tunability of the photoluminescence (PL) properties of monolayer (1L)-MoS2 via chemical doping. The PL intensity of 1L-MoS2 was drastically enhanced by the adsorption of p-type dopants with high electron affinity, but …

Apr 3, 2020 · The photoluminescence (PL) of 1L-MoS2 degrades due to aging-related defect formation. The passivation of these defects leads to substantial improvement in optical properties. Here, we report the enhancement of PL on aged 1L-MoS2 by laser treatment.

Oct 25, 2017 · We analyze the temperature-dependent PL to reveal the effective trion size, consistent with the literature, and the temperature dependence of the band gap and spin-orbit splitting of the valence...

May 16, 2014 · We report on a strong photoluminescence (PL) enhancement of monolayer MoS 2 through defect engineering and oxygen bonding. Micro-PL and Raman images clearly reveal that the PL enhancement occurs at cracks/defects formed during high-temperature annealing.

Feb 17, 2022 · The enhancement effect of plasmonic hybrids on the PL emission of MoS 2 has been systematically studied on MoS 2 /Ag spherical nanoparticle (SP) hybrid systems with different architectures by changing the stacking position of Ag SPs.

Jan 16, 2025 · Raman and PL imaging, both of which can be performed in a single microscope, can be used correlatively to gain detailed information on the layer number within the sample, as well as indicate strain, defects, and doping.

Jun 15, 2020 · We study the variation of exciton and trion photoluminescence (PL) and structural properties of few-layer MoS 2 grown on SiO 2/Si by chemical vapor deposition. Scanning electron and atomic force microscopies show that most of the flakes have a triangular shape.

Here, we demonstrate that treatment with oleic acid (OA) provides a simple wet chemical passivation method for monolayer MoSe 2, enhancing PL yields by an average of 58-fold, while also improving spectral uniformity across the material and reducing the emission linewidth.

Mar 6, 2025 · A detailed temperature-dependent line shape analysis of the PL, conducted from 4K to room temperature, reveals domain-specific trends that further reinforce the connection between polarization states and excitonic properties.

Feb 29, 2016 · By varying the thickness of the spacer between the MoSe2 layer and nanoantenna, we demonstrate manipulation of the PL intensity from nearly fourfold quenching to approximately threefold...