Plasmonic enhancement of photocurrent in MoS2 field-effect-transistor

Lin, J.; Li, Hai; Zhang, Hua; Chen, Wei

doi:10.1063/1.4807658

Cited by 208 publications

(166 citation statements)

References 35 publications

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“…Several strategies have been proposed and preliminary demonstrations have been reported including use of plasmonic metal particles, shells or resonators to enhance photocurrent and photoluminescence. [27][28][29][30][31][32][33][34][35][36][37] More sophisticated and lossless dielectric optical cavities such as photonic crystals and ring resonators have also been used to enhance absorption, mainly aimed at emission applications in monolayer samples. [38][39][40][41] For large area photovoltaic applications, light trapping strategies that involve little or no micro-or nanofabrication and patterning are desirable to improve performance while minimizing cost.…”

Section: Absorption and Photonic Designmentioning

confidence: 99%

Van der Waals Materials for Atomically-Thin Photovoltaics: Promise and Outlook

et al. 2017

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Two-dimensional (2D) semiconductors provide a unique opportunity for optoelectronics due to their layered atomic structure, electronic and optical properties. To date, a majority of the application-oriented research in this field has been focused on fieldeffect electronics as well as photodetectors and light emitting diodes. Here we present a perspective on the use of 2D semiconductors for photovoltaic applications. We discuss photonic device designs that enable light trapping in nanometer-thickness absorber layers, and we also outline schemes for efficient carrier transport and collection. We further provide theoretical estimates of efficiency indicating that 2D semiconductors can indeed be competitive with and complementary to conventional photovoltaics, based on favorable energy bandgap, absorption, external radiative efficiency, along with recent experimental demonstrations. Photonic and electronic design of 2D semiconductor photovoltaics represents a new direction for realizing ultrathin, efficient solar cells with applications ranging from conventional power generation to portable and ultralight solar power. *Corresponding author: haa@caltech.eduKeywords: Transition metal dichalcogenides, heterostructures, light-trapping, ShockleyQuessier, nanophotonics, 2D materials Since the isolation of graphene as the first free-standing two-dimensional (2D) material (from graphite), the class of layered 2D materials with weak van der Waals inter-planar bonding has expanded significantly. Two-dimensional materials now span a great diversity of atomic structure and physical properties. Prominent among these are the semiconductor chalcogenides of transition and basic metals (Mo, W, Ga, In, Sn, Re etc.) 1-3 , as well as layered allotropes of other p-block elements of the periodic table such as P, As, Te etc. 4 The availability of atomic layer thickness samples of stable, passivated, and dangling bond free semiconductor materials ushers in a new phase in solid state device design and optoelectronics.1, 5-8 A notable feature of the metal chalcogenide 2D semiconductors is the transition from an indirect bandgap in bulk to direct bandgap (Eg) in monolayer form, resulting in a high photoluminescence quantum yield (PL QY) [9][10] in turn corresponding to high radiative efficiency. This combined with the bandgap ranging from visible to near infrared part of the spectrum (1.1 to 2.0 eV) 1 makes the chalcogenides

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Section: Absorption and Photonic Designmentioning

confidence: 99%

Van der Waals Materials for Atomically-Thin Photovoltaics: Promise and Outlook

et al. 2017

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“…Much effort has thus been made to create TMD-based heterostructures like MoS 2 /graphene [9] and MoS 2 /WS 2 , [10] to improve the efficiency of charge separation/transport. Enhanced light absorption has also been achieved by hybridizing TMDs with noble metal nanoparticles [11], organic dyes [12], silicon (Si) [13], carbon nanotubes [14] and so on.…”

Section: Introductionmentioning

confidence: 99%

Unconventional solution-phase epitaxial growth of organic-inorganic hybrid perovskite nanocrystals on metal sulfide nanosheets

et al. 2018

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“…[25][26][27][28] As a result, Au 0 is produced and nucleates to form Au nanoparticles (AuNPs). Such TMD-Au hybrids are interesting for a number of applications ranging from rechargeable batteries, 27 to biosensing, 29,30 optoelectronics, [31][32][33] and catalysis. [34][35][36] Finally, as in any material, defects largely control the properties of the 2D nanosheets.…”

Section: Introductionmentioning

confidence: 99%

Production of monolayer-rich gold-decorated 2H–WS2 nanosheets by defect engineering

et al. 2018

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Chemical functionalization of low-dimensional nanostructures has evolved as powerful tool to tailor the materials' properties on demand. For two-dimensional transition metal dichalcogenides, functionalization strategies are mostly limited to the metallic 1T-polytype with only few examples showing a successful derivatization of the semiconducting 2H-polytype. Here, we describe that liquid-exfoliated WS 2 undergoes a spontaneous redox reaction with AuCl 3 . We propose that thiol groups at edges and defects sites reduce the AuCl 3 to Au 0 and are in turn oxidized to disulfides. As a result of the reaction, Au nanoparticles nucleate predominantly at edges with tuneable nanoparticle size and density. The drastic changes in nanosheet mass obtained after high loading with Au nanoparticles can be exploited to enrich the dispersions in laterally large, monolayered nanosheets by simple centrifugation. The optical properties (for example photoluminescence) of the monolayers remain pristine, while the electrocatalytic activity towards the hydrogen evolution reaction is significantly improved.

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Plasmonic enhancement of photocurrent in MoS2 field-effect-transistor

Cited by 208 publications

References 35 publications

Van der Waals Materials for Atomically-Thin Photovoltaics: Promise and Outlook

Van der Waals Materials for Atomically-Thin Photovoltaics: Promise and Outlook

Unconventional solution-phase epitaxial growth of organic-inorganic hybrid perovskite nanocrystals on metal sulfide nanosheets

Production of monolayer-rich gold-decorated 2H–WS2 nanosheets by defect engineering

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