Hot carrier photovoltaics in van der waals heterostructures

Successfully designing an ideal solar cell requires an understanding of the fundamental physics of photoexcited hot carriers (HCs) and the underlying mechanism of unique photovoltaic performance.
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Tuning Carrier Tunneling in van der Waals Heterostructures for

Dec 16, 2016· Unveiling the Hot Carrier Distribution in Vertical Graphene/h-BN/Au van der Waals Heterostructures for High-Performance Photodetector. Photocurrent Direction Control and Increased Photovoltaic Effects in All-2D Ultrathin Vertical Heterostructures Using Asymmetric h-BN Tunneling Barriers.

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Can photogenerated hot carriers be harnessed in spatially confined photovoltaic materials?

Key points Photogenerated hot carriers can be harnessed in spatially confined photovoltaic materials (2D van der Waals heterostructures), owing to slow hot carrier cooling and restricted loss channels, resulting in power conversion efficiency beyond the Shockley–Queisser limit.

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The hot pick-up technique for batch assembly of van der Waals

Jun 16, 2016· The controlled isolation and assembly of single- and few-layer sheets of two-dimensional (2D) materials into van der Waals (vdW) heterostructures has thrown open the doors for the design and

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PHYSICAL REVIEW RESEARCH2, 043051 (2020)

Van der Waals semiconductor heterostructures could be a platform to harness hot photoexcited carriers in the next generation of optoelectronic and photovoltaic devices. The internal quantum efficiency of hot-carrier devices is determined by the relation between photocarrier extraction and thermalization rates. Using ab initio

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Double-perovskite van der Waals heterostructure Cs

Apr 1, 2023· Abstract. With the development of the material performance requirements of solar photovoltaic device design, heterostructure engineering has been widely studied as an

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Van der Waals heterostructure of Bi2O2Se/MoTe2 for high

Jan 1, 2024· Two-dimensional van der Waals heterostructures exhibit distinctive electronic and optoelectronic properties, making them promising structures for constructing advanced multifunctional devices. However, devices based on conventional charge-carrier transport mechanisms often perform only a single function, which limits its integration and

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Photovoltaics in Van der Waals Heterostructures

Jun 20, 2016· The peculiar nature of light-matter interaction in atomically thin transition metal dichalcogenides is recently under examination for application in novel optoelectronic devices. Here, we show that heterostructures composed of two or more such layers can be used for solar energy harvesting. The strong absorption in these atomically thin layers makes it possible to

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Asymmetric Hot Carrier Tunneling van der Waals

Jan 14, 2020· Two-dimensional float gate van der Waals heterostructures exhibit appealing opportunity in combining optoelectronic sensing and memory functions in atomically thin layers, which as optoelectronic

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Effects of Interlayer Coupling on Hot‐Carrier

Mar 24, 2017· 2D materials exhibit a diverse array of optical and electronic properties, ranging from insulating hexagonal boron nitride and semiconducting transition metal dichalcogenides to semimetallic graphene. 1-5 Stacked 2D

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Author Correction: Hot carrier photovoltaics in van der Waals

Aug 31, 2021· Correction for ''Broadband ultrafast photovoltaic detectors based on large-scale topological insulator Sb 2 Te 3 /STO heterostructures'' by Honghui Sun, et al., Nanoscale, 2017, 9, 9325

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Photovoltaics in Van der Waals Heterostructures | Request PDF

Jan 1, 2016· Particularly, van der Waals heterostructures devices with ultrathin and ultralight features are much suitable for the application where the weight and dimension consideration are essential in the

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Observation of ultrafast interfacial Meitner-Auger energy transfer

Aug 19, 2023· These observations enrich the physical toolbox for designing van der Waals heterostructures and might be utilized in hot-carrier photovoltaic device concepts to harness the...

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GtR

van der Waals Heterostructures for Next-generation Hot Carrier Photovoltaics. Lead Research Organisation: University of Cambridge. Department Name: Materials Science & Metallurgy. Go back. Overview; Organisations; People; Abstract. Funding details. In contrast to the bulk semiconductors, spatially confined van der Waals (vdWs) layered materials

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Hot carrier photovoltaics in van der Waals heterostructures

Jan 29, 2021· Spatially confined semiconductors, especially 2D van der Waals (vdW) materials, offer several advantages, such as strong Coulomb interaction, high exciton binding energy,

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Dynamics and physical process of hot carriers in

May 1, 2022· As an important part of the third-generation photovoltaic concept, hot carrier solar cells (HCSCs) have attracted extensive attention in the field of energy conversion. Hot carrier photovoltaics in Van Der Waals heterostructures. Nat. Rev. Phys. (2021) T.G. Allen et al. Passivating contacts for crystalline silicon solar cells. Nat. Energy

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Why is interfacial carrier generation important in Van der Waals heterostructures?

Efficient interfacial carrier generation in van der Waals heterostructures is critical for their electronic and optoelectronic applications. We demonstrate broadband photocarrier generation in WS2-...

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Sci-Hub | Hot carrier photovoltaics in van der Waals heterostructures

Paul, K. K., Kim, J.-H., & Lee, Y. H. (2021). Hot carrier photovoltaics in van der Waals heterostructures. Nature Reviews Physics, 3(3), 178–192. doi:10.1038/s42254

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High Photovoltaic Quantum Efficiency in Ultrathin van der

Figure 1. Achieving high EQE in van der Waals heterostructures: (a) A schematic of the van der Waals device stack where nanophotonic light trapping combined with efficient exciton dissociation and carrier collection yields EQEs >50%. (b) A schematic of comparing near-unity

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Are VDW heterostructures a promising material for efficient HC photovoltaics?

The vdW heterostructures, a promising class of materials for efficient HC photovoltaics, is a recent discovery. Thus, studies reported so far mostly use the ultrafast transient spectroscopic techniques.

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Asymmetric Hot Carrier Tunneling van der Waals Heterostructure

Jan 14, 2020· Two-dimensional float gate van der Waals heterostructures exhibit appealing opportunity in combining optoelectronic sensing and memory functions in atomically thin layers, which as optoelectronic

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Dual polarization-enabled ultrafast bulk photovoltaic

Emerging van der Waals ( vdW) heterostructures provide the ideal platform for BPVE due to interfacial interactions naturally breaking the crystal symmetries of the individual co nstituents and

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Unveiling the Hot Carrier Distribution In Vertical Graphene/h-BN/Au Van

Feb 4, 2020· @article{Kim2020UnveilingTH, title={Unveiling the Hot Carrier Distribution In Vertical Graphene/h-BN/Au Van der Waals Heterostructures for High Performance Photodetector.}, author={Young Rae Kim and Thanh Luan Phan and Yong Seon Shin and Won Tae Kang and Ui Yeon Won and Ilmin Lee and Ji Eun Kim and Kunnyun Kim and Young Hee

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Effects of Interlayer Coupling on Hot‐Carrier Dynamics in

Mar 24, 2017· 2D materials exhibit a diverse array of optical and electronic properties, ranging from insulating hexagonal boron nitride and semiconducting transition metal dichalcogenides to semimetallic graphene. 1-5 Stacked 2D materials, or van der Waals (vdW) heterostructures, 6-8 have generated considerable recent interest as designer plasmonic, photonic, and

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Dual polarization-enabled ultrafast bulk photovoltaic response in van

The bulk photovoltaic effect (BPVE) originating from spontaneous charge polarizations can reach high conversion efficiency exceeding the Shockley-Queisser limit. Emerging van der Waals (vdW) heterostructures provide the ideal platform for BPVE due to interfacial interactions naturally breaking the crystal symmetries of the individual constituents and thus inducing charge

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Tuning Carrier Tunneling in van der Waals Heterostructures for

DOI: 10.1021/acs.nanolett.6b04449 Corpus ID: 206737413; Tuning Carrier Tunneling in van der Waals Heterostructures for Ultrahigh Detectivity. @article{Vu2017TuningCT, title={Tuning Carrier Tunneling in van der Waals Heterostructures for Ultrahigh Detectivity.}, author={Quoc An Vu and Jin Hee Lee and Van Luan Nguyen and Yong Seon Shin and Seong Chu Lim and Kiyoung

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High Photovoltaic Quantum Efficiency in Ultrathin van der

quantitative characterization of few-atomic-layer thickness optoelectronic devices in van der Waals heterostructures. In this paper, we demonstrate external quantum efficiencies > 50% (Figure 1(a)), indicating that van der Waals heterostructures have considerable potential for efficient photovoltaics.

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Optical Coherence Tomography of Van Der Waals Heterostructures

Sep 2, 2024· New experimental methods with high out‐of‐plane spatial sensitivity combined with ultrafast temporal resolution can revolutionize the understanding of charge‐ and heat‐transfer dynamics occurring at interfaces. In this work, a step forward is taken in this direction by applying coherence tomography with extreme ultraviolet (EUV) light to different van der Waals

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How do alkali cations reduce carrier density in hot carrier solar cells?

By suppressing the loss of excessive energy to defects, the alkali cations also reduce the threshold carrier density for achieving picosecond carrier cooling via hot phonon effect by an order of magnitude. These results underscore the opportunities in designing optimal hybrid perovskite structures for hot carrier solar cells.

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Photocarrier generation from interlayer charge-transfer

Efficient interfacial carrier generation in van der Waals heterostructures is critical for their electronic and optoelectronic applications. We demonstrate broadband photocarrier generation in WS 2-graphene heterostructures by imaging interlayer coupling–dependent charge generation using ultrafast transient absorption microscopy terlayer charge-transfer (CT) transitions and

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Van der Waals Heterostructures for Photoelectric,

A van der Waals (vdW) heterostructure is formed by combining multiple materials through vdW bonds. Additionally, the application of 2D/3D heterostructures demonstrates significant potential for photovoltaic (PV) applications. Chen

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Emergent second-harmonic generation in van der Waals

Mar 15, 2023· Van der Waals (vdW) stacking of two-dimensional (2D) materials to create artificial structures has enabled remarkable discoveries and novel properties in fundamental physics. Y. H. Lee, Hot carrier photovoltaics in van der Waals heterostructures. Nat. Rev. Phys. 3, 178–192 X. Luo, G. Li, Y. Chen, C. Zhang, J. He, Tunable ultrafast

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Is direct interlayer hot carrier transfer efficient in Van der Waals heterostructures?

Unlike conventional bulk heterostructures, direct interlayer hot carrier transfer on the ultrafast timescale can be efficient in van der Waals heterostructures without phonon emission due to momentum conservation at the K-point.

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Ultrafast hot carrier transfer in WS2/graphene large area

Mar 28, 2022· Recently van der Waals heterostructures (HS), obtained by stacking graphene sheets with other 2D crystals (e.g. boron nitride, transition metal dichalcogenides or graphene itself), have received

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Hot carrier photovoltaics in van der Waals heterostructures

Jan 29, 2021· Photogenerated hot carriers can be harnessed in spatially confined photovoltaic materials (2D van der Waals heterostructures), owing to slow hot carrier cooling and restricted

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Hot carrier photovoltaics in van der Waals heterostructures

This Review provides a detailed mechanistic understanding of the HC cooling dynamics in confined vdW layered materials for efficiently utilizing HCs and discusses the role of carrier

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Are 2D van der Waals layered materials and perovskite nanostructures efficient?

Both 2D van der Waals layered materials and perovskite nanostructures demonstrate high carrier multiplication conversion efficiency. Moreover, 2D van der Waals heterostructures also demonstrate highly efficient interlayer carrier multiplication near room temperature.

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Can a van der Waals heterostructure provide new hot-carrier-based device concepts?

The energy transfer mechanism revealed here might enable new hot-carrier-based device concepts with van der Waals heterostructures. Here, the authors investigate the interfacial charge/energy transfer dynamics in a WSe2/graphene heterostructure.

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About Hot carrier photovoltaics in van der waals heterostructures

About Hot carrier photovoltaics in van der waals heterostructures

Successfully designing an ideal solar cell requires an understanding of the fundamental physics of photoexcited hot carriers (HCs) and the underlying mechanism of unique photovoltaic performance.

•Photogenerated hot carriers can be harnessed in spatially confined photovoltaic.

To design an ideal solar cell, it is essential to understand the major energy loss mechanisms in a conventional solar cell. In principle, extrinsic losses (impurities, series resistance.

The evolution of carrier distribution with time and typical energy loss mechanism in a semiconductor through phonon decay is discussed in this section (Fig. 2a–c), followed b.

In addition to specially engineered semiconductors, graphene has emerged as an alternative, promising system to explore solar energy harvesting via the redistributio.

The above-mentioned problems may be partially overcome by relaxing the momentum requirement for an efficient interfacial charge transfer, which can be achieved b.Photogenerated hot carriers can be harnessed in spatially confined photovoltaic materials (2D van der Waals heterostructures), owing to slow hot carrier cooling and restricted loss channels, resulting in power conversion efficiency beyond the Shockley–Queisser limit.

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