Universal Strategy Integrating Strain and Interface Engineering to Drive High‐Performance 2D Material Photodetectors

Gao, Wei; Song, Qiqi; Zhou, Yuchen; Huang, Le; Zheng, Zhaoqiang; Zhao, Yu; Yao, Jiandong; Li, Jingbo

doi:10.1002/adom.202100450

Cited by 38 publications

(34 citation statements)

References 46 publications

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“…An α-In 2 Se 3 nanoflake was selected as the sensing material due to its direct band gap in the multilayer form . The Raman spectrum of the α-In 2 Se 3 nanoflake shows four peaks at 86, 103, 180, and 193 cm –1 (Figure a), which is consistent with our previous report . The AFM height profile indicates that the thickness of the α-In 2 Se 3 nanoflake was about 62.3 nm (Figure S6).…”

Section: Resultssupporting

confidence: 86%

“…68 The Raman spectrum of the α-In 2 Se 3 nanoflake shows four peaks at 86, 103, 180, and 193 cm −1 (Figure 8a), which is consistent with our previous report. 35 The AFM height profile indicates that the thickness of the α-In 2 Se 3 nanoflake was about 62.3 nm (Figure S6). To confirm the photosensing properties, the current−voltage (I−V) curves of the α-In 2 Se 3 -based device were recorded in the illumination of laser light and in the dark, respectively.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…α-In 2 Se 3 nanoflake was exfoliated on a SiO 2 /Si (300 nm/500 μm) substrate following a previous report. 35 Then, the conducting electrodes across the α-In 2 Se 3 nanoflake were patterned with standard ultraviolet photolithography (μpg 501, Heidelberg), followed by the deposition of Ti/Au (10/100 nm) layers through electron beam evaporation to finalize the photodetector fabrication.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

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Device-Scaled Controlled Crumpling of MXene-Based Ultrathin Supercapacitors as Stretchable Power Sources

Tang

Zhao

et al. 2022

ACS Appl. Energy Mater.

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Two-dimensional transition-metal carbide (MXene) Ti3C2T x possesses advantages of high conductivity and high volumetric capacitance, making it an ideal electrode material for high-performance supercapacitors. However, the high stiffness impedes its direct implementation in stretchable supercapacitors for integrated wearable electronics. Here, we demonstrate a stretchable supercapacitor based on Ti3C2T x electrodes through a device-scaled controlled crumpling strategy. An ultrathin supercapacitor with a thickness of about 45 μm is assembled with gold foil gilded ultrathin preservative membrane as a current collector, drop cast Ti3C2T x as an active material, and poly(vinyl alcohol)-H3PO4 as a polymer gel electrolyte. The ultrathin supercapacitor with optimized electrodes exhibits an areal specific capacitance of 10.2 mF cm–2 at 5 mV s–1 with excellent mechanical flexibility. The controlled adhesion of the ultrathin supercapacitor on a prestretched latex substrate and the elastic deformation of the substrate induce local displacements on the ultrathin supercapacitor to create periodic crumples. Stretching the crumpled supercapacitor only causes the amplitude and wavelength changes of the crumples, leading to a high level of stretchability (up to 100%). Also, the crumpled supercapacitor can sustain 1000 stretching cycles at a maximum strain of 100%. Moreover, it can provide sufficient power to drive α-In2Se3 nanoflake-based photodetector at 100% strain. This device-scaled controlled crumpling method provides a facile and effective way to design stretchable energy devices with high stretching durability for stretchable devices.

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Section: Resultssupporting

confidence: 86%

Section: ■ Results and Discussionmentioning

confidence: 99%

Section: ■ Experimental Sectionmentioning

confidence: 99%

See 1 more Smart Citation

Device-Scaled Controlled Crumpling of MXene-Based Ultrathin Supercapacitors as Stretchable Power Sources

Tang

Zhao

et al. 2022

ACS Appl. Energy Mater.

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“…Fabrication of the Photodetector: WS 2 nanoflake was exfoliated on a SiO 2 /Si substrate following the similar process in the previous report. [49] Briefly, WS 2 nanoflakes were cleaved from the bulk crystal by the scotch tape and were transferred onto a poly(methyl methacrylate) (PMMA) transfer layer. The PMMA transfer layer with a WS 2 nanoflake was pressed onto the SiO 2 /Si substrate at 60 °C for 5 min.…”

Section: Methodsmentioning

confidence: 99%

Re‐Stickable Yarn Supercapacitors with Vaper Phase Polymerized Multi‐Layered Polypyrrole Electrodes for Smart Garments

Zhao

Wan

Yuan

et al. 2022

Macromol. Rapid Commun.

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Yarn supercapacitors have attracted significant attention for wearable energy storage due to their ability to be directly integrated with garments. Conducting polymer polypyrrole (PPy) based yarn supercapacitors show limited cycling stability because of the huge volume changes during the charge-discharge processes. In addition, laundering may cause damage to such yarn supercapacitors. Here, the fabrication of PPy-based re-stickable yarn supercapacitors is reported with good cycling stability by employing vapor phase polymerization (VPP) and water-soluble polyethylene oxide (PEO) film as the adhesive layer. VPP duration and cycle are controlled to achieve multi-layered PPy electrodes. The assembled yarn supercapacitors show a good cycling stability with capacitance retention of 79.1% after 5000 charge-discharge cycles. The energy stored in the yarn supercapacitor is sufficient to power a photodetector. After gluing the yarn supercapacitors onto a PEO film, the devices can be stunk on and peeled off the garment to avoid the mechanical stresses during the washing process. Three yarn supercapacitors connected in parallel on PEO film show negative changes in electrochemical performance after 5 sticking-peeling cycles. This work provides a facile way to fabricate PPy-based re-stickable energy storage devices with high cycling stability for smart garments.

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“…5e presents a complete photoresponse cycle of the M-WS 2 /Te device. The rise time (τ rise ) and decay time (τ decay ) are defined as the times required for the photocurrent to change from 10% to 90% and from 90% to 10%, respectively [42,43].…”

Section: Science China Materialsmentioning

confidence: 99%

Hybrid 1D/2D heterostructure with electronic structure engineering toward high-sensitivity and polarization-dependent photodetector

et al. 2021

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The widespread application of photodetectors has triggered an urgent need for high-sensitivity and polarization-dependent photodetection. In this field, the two-dimensional (2D) tungsten disulfide (WS 2 ) exhibits intriguing optical and electronic properties, making it an attractive photosensitive material for optoelectronic applications. However, the lack of an effective built-in electric field and photoconductive gain mechanism in 2D WS 2 impedes its application in high-performance photodetectors. Herein, we propose a hybrid heterostructure photodetector that contains 1D Te and 2D WS 2 . In this device, 1D Te induces in-plane strain in 2D WS 2 , which regulates the electronic structures of local WS 2 and gives rise to type-II band alignment in the horizontal direction. Moreover, the vertical heterojunction built of 2D WS 2 and 1D Te introduces a high photoconductive gain. Benefiting from these two effects, the transfer of photogenerated carriers is optimized, and the proposed photodetector exhibits high sensitivity (photoresponsivity of ~27.7 A W −1 , detectivity of 9.5 × 10 12 Jones, and short rise/ decay time of 19.3/17.6 ms). In addition, anisotropic photodetection characteristics with a dichroic ratio up to 2.1 are achieved. This hybrid 1D/2D heterostructure overcomes the inherent limitations of each material and realizes novel properties, opening up a new avenue towards constructing multifunctional optoelectronic devices.

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Universal Strategy Integrating Strain and Interface Engineering to Drive High‐Performance 2D Material Photodetectors

Cited by 38 publications

References 46 publications

Device-Scaled Controlled Crumpling of MXene-Based Ultrathin Supercapacitors as Stretchable Power Sources

Device-Scaled Controlled Crumpling of MXene-Based Ultrathin Supercapacitors as Stretchable Power Sources

Re‐Stickable Yarn Supercapacitors with Vaper Phase Polymerized Multi‐Layered Polypyrrole Electrodes for Smart Garments

Hybrid 1D/2D heterostructure with electronic structure engineering toward high-sensitivity and polarization-dependent photodetector

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