Nov 23, 2017 · Here we report the scalable synthesis of uniform single-layer WS 2 film by a two-step chemical vapor deposition (CVD) method followed by a laser thinning process. The PL intensity increases...

May 12, 2021 · For the indirect bandgap transition in bilayer WS 2, multifold enhancement can be achieved with the photoluminescence (PL) polarization either perpendicular or parallel to the long axis of...

Nov 29, 2012 · Here we describe the direct synthesis of WS 2 monolayers with triangular morphologies and strong room-temperature photoluminescence (PL). The Raman response as well as the luminescence as a function of the number of S–W–S layers is also reported.

Mar 18, 2015 · Here we report experimental approaches to measuring the exciton binding energy of monolayer WS 2 with linear differential transmission spectroscopy and two-photon photoluminescence excitation...

Apr 28, 2017 · We found a red shift and parabolic intensity increase in the PL emission of the monolayer WS 2 with the increasing excitation power and the decay time constants corresponding to the recombination of trions and excitons from transient PL dynamics.

With the help of the Shamrock 500i spectrograph and the iDus 420 CCD detector, the Raman spectrum and the PL spectra of monolayer as a function of liquid gating voltage can be successfully characterized.

This research explores the impact of the number of WS2 layers on the ability to detect gases by examining the layer-dependent sensing performance of WS2-based gas sensors.

Chemical vapor deposited WS 2 monolayers are subjected for the first time to controlled pure biaxial tensile strain up to 0.7%. From photoluminescence (PL) spectroscopy, the trion and neutral exciton deformation potentials are found to be similar, approximately −130 meV/%.

Apr 1, 2022 · In this work, we present a new approach to enhancing the excitonic behavior in monolayer tungsten disulfide (WS 2) by applying OAM of light, also known as twisted light (28).

Aug 1, 2021 · In this work, we study the polarized PL spectroscopy of WS 2, WSe 2, and bilayer WS 2 /WSe 2 heterostructures using radially and azimuthally polarized laser beams. Excitation power dependent polarized PL spectra were collected from WS 2 …