Study on photoelectric characteristics of monolayer WS₂ films

Abstract

It is important to determine the time-dependent evolution of the excited monolayer WS2, which will provide a basis for the reasonable design of optoelectronic devices based on two-dimensional transition metal dichalcogenides.

A colloidal route to semiconducting tungsten disulfide nanosheets with monolayer thickness

“…The A exciton position value is similar to what has already been reported for colloidal monolayer WS 2 21–23 while our sample shows a blue shifted B exciton compared to similar samples. The energy splitting between the two excitons (as a consequence of the strong spin–orbit coupling in W atoms 36 ) is 96.1 nm (∼387 meV), in line with what has observed been in CVD 37 as well as colloidal WS 2 nanosheets. 22…”

Investigation of Hot Carrier Cooling Dynamics in Monolayer MoS2

“…20 Herein, the TA spectrum is fitted by five Gaussian peaks. 35 Considering the spectral feature of TA spectra in Figure 1d and the previous reports, 20,26,27 we highlight four key points. First, the A-X and B-X correspond to the transition from VB 1 and VB 2 to CB 1 , respectively.…”

“…The two-dimensional TA spectra of M-MoS 2 with different excitation photon energy are exhibited in Figure S2, showing that the TA spectra of M-MoS 2 have rich spectral features . Herein, the TA spectrum is fitted by five Gaussian peaks . Considering the spectral feature of TA spectra in Figure d and the previous reports, ,, we highlight four key points.…”

Effect of Chemical Vapor Deposition WS2 on Viability and Differentiation of SH-SY5Y Cells

“…Moreover WS 2 has been applied in photothermal and photodynamic therapy, thanks to its good water solubility and high near infrared absorption capability (Chimene et al, 2015). Thanks to its known photoelectric characteristics (Rossi et al, 2018;Wang et al, 2019), WS 2 could be used to realize a stimulating electrode based on the local photocurrent controlled by light, similarly to the light-directed electrical stimulation reported in the past for silicon wafer (Starovoytov et al, 2005). Due to this increasing interest, WS 2 biocompatibility and toxicity tests need to be performed.…”