May 22, 2015 · Here, we report systematical studies on ambient pressure chemical vapor deposition (CVD) growth of monolayer and few layer WSe 2 flakes directly on silica substrates. The WSe 2 flakes were characterized using optical microscopy, atomic force microscopy, Raman spectroscopy, and photoluminescence spectroscopy.

Jan 2, 2019 · In this work, we demonstrate synthetic tungsten diselenide (WSe 2) monolayers with PL QY exceeding that of exfoliated crystals by over an order of magnitude. PL QY of ~60% is obtained in monolayer films grown by CVD, which is the highest reported value to date for WSe 2 prepared by any technique.

Feb 27, 2019 · Recently, a surprising breakthrough has been made by Gao et al. 10 in the growth of monolayer WSe 2 on Au (111) by CVD. Remarkably, they have been able to achieve ultrafast growth rates of ~8.3...

Aug 3, 2015 · Here we demonstrate for the first time a two-step chemical vapor deposition (CVD) method for growing transition-metal dichalcogenide (TMD) heterostructures, where MoSe 2 was synthesized first and followed by an epitaxial growth of WSe 2 …

This paper investigated the growth of WSe 2 films by atmospheric pressure chemical vapor deposition (CVD). The introduction of hydrogen in the reaction chamber helps to activate the selenization of WO 3, where large-size WSe 2 monolayer and …

Abstract: This study introduces a novel hybrid p-doping strategy, integrating tungsten oxide (WO x) charge transfer and nitric oxide (NO) molecular doping with wafer-scale CVD grown monolayer tungsten diselenide (1L-WSe 2).

Jan 1, 2025 · Several CVD parameters such as precursor content, H 2 /Ar gas flow rate, and substrate were investigated to optimize the lateral growth of WSe 2 in the presence of a NaCl promoter.

Jan 8, 2020 · Electronic characterization shows that the resulting monolayer WSe 2 material exhibits excellent electronic properties with carrier mobility up to 90 cm 2 V −1 s −1, comparable to that of the best exfoliated monolayers. Our study provides a robust pathway for rapid growth of high-quality TMD single crystals.

3 days ago · While monolayers of WSe2, an intrinsic p-type two-dimensional semiconductor, have been widely studied for their optical and electrical properties, large-scale synthesis of WSe2 monolayers via chemical vapor deposition (CVD) can be challenging due to the high temperatures required to generate sufficient W vapor phase from oxide precursors. Utilizing a mixture of NaCl and tungsten oxide as a ...

Abstract: Monolayer transition metal dichalcogenides (TMDs), including WSe 2 often show unique and exciting optical and electrical features. WSe 2 is well-suited for high-performance optoelectronic devices, such as photodetectors due to its intense photoluminescence properties.