Strong and efficient doping of monolayer MoS2 by a graphene electrode

文献情報

出版日 2019-11-05

DOI 10.1039/C9CP04993B

インパクトファクター 3.676

著者

Zuzana Melnikova-Kominkova, Katerina Jurkova, Vaclav Vales, Karolina Drogowska-Horná, Otakar Frank, Martin Kalbac

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要旨

The efficient manipulation of the optoelectronic properties of layered semiconductors is essential for future applications of these unique materials. Here, we demonstrate that single-layer, large-area graphene can serve as a conductive spacer between an electrolyte solution and single-layer MoS2. In situ Raman and photoluminescence (PL) spectroscopies were employed to monitor the charge transfer from graphene to MoS2. The Raman G and 2D bands were used to quantify the carrier concentration in graphene. The high efficiency of the charge transfer via graphene in a broad carrier concentration range of ±2.1 × 1013 cm−2 was documented by the extreme sensitivity of the MoS2 Raman mode to the electron-doping (shift rate of ∼2.5 cm−1/1 × 1013 cm−2 electron concentration) and the high sensitivity of the PL yield, which drops by more than one and two orders of magnitude in the hole and electron doping regimes, respectively. The easy implementation, and the lithography-free effectiveness of the setup, in terms of the achievable carrier concentration range and the charge-transfer efficiency, could be an asset in near-future research and in the development of optoelectronic devices.

掲載誌

Physical Chemistry Chemical Physics

CiteScore: 5.5

自己引用率: 10.3%

年間論文数: 3036

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.

Strong and efficient doping of monolayer MoS2 by a graphene electrode

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