Large-area, flexible broadband photodetector based on WS2 nanosheets films

Li, Jingyang; Han, Jianfu; Li, Hongxing; Fan, Xiaoyan; Huang, Kai

doi:10.1016/j.mssp.2019.104804

Cited by 66 publications

(31 citation statements)

References 32 publications

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“…The origin of the hysteresis stem from a large number of interfaces between flakes in the film and film-metal contact interface that could lead to some charging effects. We found that the resistance of WS 2 thin film is relatively high (R S = 48 MΩ/□ for T = 440 K), but not significantly different than previously reported [ 36 ]. Figure 3 c shows the natural logarithm of the R S versus (k B T) −1 , where the slope of the linear dependence directly represents the value of the activation energy.…”

Section: Resultscontrasting

confidence: 64%

Study of Structural and Optoelectronic Properties of Thin Films Made of a Few Layered WS2 Flakes

et al. 2020

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We report a surfactant-free exfoliation method of WS2 flakes combined with a vacuum filtration method to fabricate thin (<50 nm) WS2 films, that can be transferred on any arbitrary substrate. Films are composed of thin (<4 nm) single flakes, forming a large size uniform film, verified by AFM and SEM. Using statistical phonons investigation, we demonstrate structural quality and uniformity of the film sample and we provide first-order temperature coefficient χ, which shows linear dependence over 300–450 K temperature range. Electrical measurements show film sheet resistance RS = 48 MΩ/Υ and also reveal two energy band gaps related to the intrinsic architecture of the thin film. Finally, we show that optical transmission/absorption is rich above the bandgap exhibiting several excitonic resonances, and nearly feature-less below the bandgap.

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Section: Resultscontrasting

confidence: 64%

Study of Structural and Optoelectronic Properties of Thin Films Made of a Few Layered WS2 Flakes

et al. 2020

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“…The linearity of the current-voltage curve can be attributed to the ohmic contact between the sample and the metal electrode, 30 which is considered to be benecial for the extraction of photo-generated carriers. To further explore the sensitivity of photodetectors at different wavelengths, Fig.…”

Section: Resultsmentioning

confidence: 99%

A hydrothermally synthesized MoS_2(1−x)Se_2x alloy with deep-shallow level conversion for enhanced performance of photodetectors

et al. 2020

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“…In general, the time required to increase the photocurrent from 10% to 90% of the peak value is defined as the rise time, and the fall time is the opposite. [33] The rise and fall times of our photodetectors at a power density of 1.75 mW mm −2 and a bias voltage of 1 V are 5.24 and 3.71 s, respectively.…”

Section: Device Manufacturing and Measurementmentioning

confidence: 83%

Simple Hydrothermal Synthesis of Molybdenum Disulfide and Its Application for a Large‐Area Photodetector

Hou

Liu

Liao

et al. 2020

Crystal Research and Technology

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Here, molybdenum disulfide with graphene‐like structure is prepared by a feasible and simple hydrothermal method. It is also characterized by X‐ray diffraction and a scanning electron microscope to verify the yield and quality of the prepared molybdenum disulfide (MoS2). In addition, a type of photodetector is prepared from the prepared MoS2 as a photosensitive material, and its light response characteristics are explored. The experimental results show that the prepared MoS2 has good photoresponse performance, and it can achieve a photocurrent of 2.40 µA under 660 nm light of 9.85 mW mm−2. At the same time, it shows stable and repeatable light response characteristics at different bending angles. This work is considered as a way to construct a new type of photodetector with a simple manufacturing process and low cost.

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Large-area, flexible broadband photodetector based on WS2 nanosheets films

Cited by 66 publications

References 32 publications

Study of Structural and Optoelectronic Properties of Thin Films Made of a Few Layered WS2 Flakes

Study of Structural and Optoelectronic Properties of Thin Films Made of a Few Layered WS2 Flakes

A hydrothermally synthesized MoS_2(1−x)Se_2x alloy with deep-shallow level conversion for enhanced performance of photodetectors

Simple Hydrothermal Synthesis of Molybdenum Disulfide and Its Application for a Large‐Area Photodetector

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Large-area, flexible broadband photodetector based on WS2 nanosheets films

Cited by 66 publications

References 32 publications

Study of Structural and Optoelectronic Properties of Thin Films Made of a Few Layered WS2 Flakes

Study of Structural and Optoelectronic Properties of Thin Films Made of a Few Layered WS2 Flakes

A hydrothermally synthesized MoS2(1−x)Se2x alloy with deep-shallow level conversion for enhanced performance of photodetectors

Simple Hydrothermal Synthesis of Molybdenum Disulfide and Its Application for a Large‐Area Photodetector

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A hydrothermally synthesized MoS_2(1−x)Se_2x alloy with deep-shallow level conversion for enhanced performance of photodetectors