Vapor growth of V-doped MoS2 monolayers with enhanced B-exciton emission and broad spectral response-Reference-Cited by-同舟云学术

Vapor growth of V-doped MoS2 monolayers with enhanced B-exciton emission and broad spectral response

Published:2023-12-07 Issue:1 Volume:16 Page:
ISSN:2095-2767
Container-title:Frontiers of Optoelectronics
language:en
Short-container-title:Front. Optoelectron.

Author:

Zheng Biyuan,Sun Xingxia,Zheng Weihao,Zhu Chenguang,Ma Chao,Pan Anlian,Li Dong,Li Shengman

Abstract

AbstractDynamically engineering the optical and electrical properties in two-dimensional (2D) materials is of great significance for designing the related functions and applications. The introduction of foreign-atoms has previously been proven to be a feasible way to tune the band structure and related properties of 3D materials; however, this approach still remains to be explored in 2D materials. Here, we systematically demonstrate the growth of vanadium-doped molybdenum disulfide (V-doped MoS2) monolayers via an alkali metal-assisted chemical vapor deposition method. Scanning transmission electron microscopy demonstrated that V atoms substituted the Mo atoms and became uniformly distributed in the MoS2 monolayers. This was also confirmed by Raman and X-ray photoelectron spectroscopy. Power-dependent photoluminescence spectra clearly revealed the enhanced B-exciton emission characteristics in the V-doped MoS2 monolayers (with low doping concentration). Most importantly, through temperature-dependent study, we observed efficient valley scattering of the B-exciton, greatly enhancing its emission intensity. Carrier transport experiments indicated that typical p-type conduction gradually arisen and was enhanced with increasing V composition in the V-doped MoS2, where a clear n-type behavior transited first to ambipolar and then to lightly p-type charge carrier transport. In addition, visible to infrared wide-band photodetectors based on V-doped MoS2 monolayers (with low doping concentration) were demonstrated. The V-doped MoS2 monolayers with distinct B-exciton emission, enhanced p-type conduction and broad spectral response can provide new platforms for probing new physics and offer novel materials for optoelectronic applications. Graphical abstract

Publisher

Springer Science and Business Media LLC

Subject

Electrical and Electronic Engineering,Electronic, Optical and Magnetic Materials

Link

https://link.springer.com/content/pdf/10.1007/s12200-023-00097-w.pdf

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