III–VI van der Waals heterostructures for sustainable energy related applications

Chen, Jianhui; He, Xiao-Jun; Sa, Baisheng; Zhou, Jian; Xu, Chao; Wen, Cuilian; Sun, Zhimei

doi:10.1039/c9nr00421a

Cited by 97 publications

(74 citation statements)

References 79 publications

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“…This tendency assigns important missions to the scientists to find efficient photocatalytic catalysts that operating well under the sun light irradiation 5 . Many scientists paid their attention on the two-dimensional (2D) semiconductors since 2D materials fulfil the requirements of energy-conversion devices with suitable width of band gap, wider surface area, lower recombination rate of photo-generated electron-hole pairs, and higher absorbance for visible light [6][7][8][9][10] . To date, a series of efficient photocatalytic monolayers such as h-BN 11 , ZnO 12 , WS 2…”

Section: First Principles Calculation For Photocatalytic Activity Of mentioning

confidence: 99%

First Principles Calculation for Photocatalytic Activity of GaAs Monolayer

Rouzhahong

Wushuer

Mamat

et al. 2020

Sci Rep

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Solar energy hydrogen production is one of the best solutions for energy crisis. Therefore, finding effective photocatalytic materials that are able to split water under the sunlight is a hot topic in the present research fields. In addition, theoretical prediction is a present low-cost important method to search a new kind of materials. Herein, with the aim of seeking efficient photocatalytic material we investigated the photocatalytic activity of GaAs monolayer by the first principles calculation. According to the obtained electronic and optical properties, we primarily predicted the photocatalytic water splitting activity of GaAs monolayer, which the result further confirmed by the calculated reaction free energy. More remarkably, predicted carrier mobility of GaAs monolayer 2838 cm2V−1s−1 is higher than 200 cm2V−1s−1 of MoS2. Our finding provides a promising material for the development of renewable energy conversion and a new outlook for better designing of a superior photocatalyst for water splitting.

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Section: First Principles Calculation For Photocatalytic Activity Of mentioning

confidence: 99%

First Principles Calculation for Photocatalytic Activity of GaAs Monolayer

Rouzhahong

Wushuer

Mamat

et al. 2020

Sci Rep

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“…The presence of the vdW gap allows for the intercalation of guest species as a means to modify materials' structural, electronic, and optical properties [18]. These properties, the large surface area to volume ratios, and the presence of the vdW gap [19][20][21][22][23][24] make vdW materials candidates for hydrogen technologies.…”

Section: Introductionmentioning

confidence: 99%

The Interaction of Hydrogen with the van der Waals Crystal γ-InSe

et al. 2020

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The emergence of the hydrogen economy requires development in the storage, generation and sensing of hydrogen. The indium selenide ( γ -InSe) van der Waals (vdW) crystal shows promise for technologies in all three of these areas. For these applications to be realised, the fundamental interactions of InSe with hydrogen must be understood. Here, we present a comprehensive experimental and theoretical study on the interaction of γ -InSe with hydrogen. It is shown that hydrogenation of γ -InSe by a Kaufman ion source results in a marked quenching of the room temperature photoluminescence signal and a modification of the vibrational modes of γ -InSe, which are modelled by density functional theory simulations. Our experimental and theoretical studies indicate that hydrogen is incorporated into the crystal preferentially in its atomic form. This behaviour is qualitatively different from that observed in other vdW crystals, such as transition metal dichalcogenides, where molecular hydrogen is intercalated in the vdW gaps of the crystal, leading to the formation of “bubbles” for hydrogen storage.

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“…Ultrathin thickness of channels can facilitate fast heat dissipation and quick response to external stimuli. Moreover, 2D materials can be vertically stacked on arbitrary materials, enabling rich device operations and physics . The number of reports on 2D materials‐based synaptic devices has accordingly increased rapidly.…”

Section: Introductionmentioning

confidence: 99%

Recent Progress in Synaptic Devices Based on 2D Materials

Sun

Wang

Yang

2020

Advanced Intelligent Systems

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Diverse synaptic plasticity with a wide range of timescales in biological synapses plays an important role in memory, learning, and various signal processing with exceptionally low power consumption. Emulating biological synaptic functions by electric devices for neuromorphic computation has been considered as a way to overcome the traditional von Neumann architecture in which separated memory and information processing units require high power consumption for their functions. Synaptic devices are expected to conduct complex signal processing such as image classification, decision‐making, and pattern recognition in artificial neural networks. Among various materials and device architectures for synaptic devices, 2D materials and their van der Waals (vdW) heterostructures have been attracting tremendous attention from researchers based on their capacity to mimic unique synaptic plasticity for neuromorphic computing. Herein, the basic operations of biological synapses and physical properties of 2D materials are discussed, and then 2D materials and their vdW heterostructures for advanced synaptic operations with novel working mechanisms are reviewed. In particular, there is a focus on how to design synaptic devices with the vdW structures in terms of critical 2D materials and their limitations, providing insight into the emerging synaptic device systems and artificial neural networks with 2D materials.

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III–VI van der Waals heterostructures for sustainable energy related applications

Abstract: III–VI van der Waals heterostructures are potential candidates in sustainable energy related areas.

Cited by 97 publications

References 79 publications

First Principles Calculation for Photocatalytic Activity of GaAs Monolayer

First Principles Calculation for Photocatalytic Activity of GaAs Monolayer

The Interaction of Hydrogen with the van der Waals Crystal γ-InSe

Recent Progress in Synaptic Devices Based on 2D Materials

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