Polarized Raman spectroscopy study of CVD-grown CrS flakes: unambiguous identification of phonon modes.

We report a systematic Raman spectroscopy investigation of chemical vapor deposited 2D nonlayered CrS, with both linearly and circularly polarized light over a wide temperature range (5-300 K). Temperature-dependent Raman spectra exhibit a good linear relationship between the peak positions of the phonon modes and temperature. Angle-resolved polarized Raman spectra reveal the polarization-dependent optical response of in-plane and out-of-plane phonon modes.

Increased Mobility and Reduced Hysteresis of MoS Field-Effect Transistors via Direct Surface Precipitation of CsPbBr-Nanoclusters for Charge Transfer Doping.

Transition-metal dichalcogenides (TMDs) and metal halide perovskites (MHPs) have been investigated for various applications, owing to their unique physical properties and excellent optoelectronic functionalities. TMD monolayers synthesized via chemical vapor deposition (CVD), which are advantageous for large-area synthesis, exhibit low mobility and prominent hysteresis in the electrical signals of field-effect transistors (FETs) because of their native defects. In this study, we demonstrate an increase in electrical mobility by ∼170 times and reduced hysteresis in the current-bias curves of MoS FETs hybridized with CsPbBr for charge transfer doping, which is implemented via solution-based CsPbBr-nanocluster precipitation on CVD-grown MoS monolayer FETs.