MoS2 triboelectric nanogenerators based on depletion layers

Kim, Myeongjin; Kim, Sung Hyun; Park, Myung Uk; Lee, Chang Jun; Kim, Min-Ju; Yi, Yeonjin; Yoo, Kyung Hwa

doi:10.1016/j.nanoen.2019.104079

Cited by 40 publications

(27 citation statements)

References 46 publications

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“…Quite a few studies have been reported on composites of MoS 2 /PVDF. Advanced triboelectric properties of PVDF fibers, electrospun on MoS 2 monolayer grown by chemical vapor deposition (CVD) on silicon substrates have been reported by Kim et al 27 . Cellulose filled with MoS 2 , coated with PVDF fibers, giving enhanced output of nano‐generator has been reported by Parikshit et al 26 .…”

Section: Introductionmentioning

confidence: 92%

“…CNTs, 19–20 graphene, 21–23 and so on. Reports of composite fibers of MoS 2 with PVDF also exist 24–27 . However, reports of freestanding thin films of MoS 2 /PVDF composites are rare.…”

Section: Introductionmentioning

confidence: 99%

“…Earlier reports of MoS 2 /PVDF composites involved extensive and elaborate synthesis procedures e.g., electrospinning method, 24–27 multi‐step sol–gel method, 29 and so on. The methods involved were cumbersome and time consuming, involving a lot of steps.…”

Section: Introductionmentioning

confidence: 99%

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Enhancing the electroactive phases in freestanding flexible films of MoS ₂ / PVDF

Thakur

Jangra

Dam

et al. 2020

Polymer Crystallization

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Freestanding, flexible, composite thin films of MoS2/PVDF have been synthesized using sol–gel method. Concentration of the fillers was optimized to tune the formation of electroactive phases (EA). The maximum amount of EA phases was obtained for 1 wt% of filler concentration. The as‐prepared samples were characterized to understand the effect of fillers on their microstructural, vibrational, and morphological properties. The fractions, of both β and γ phases, were calculated from infrared spectra. An enhancement of the EA phase from 28% to 83% was observed with the addition of 1 wt% of nanoflake fillers. The fillers were found to reduce the crystallinity of the host polymer matrix. Additionally, the morphology shows a change from spherulitic to fibrous nature with the appearance of nanoflakes on the surface for higher filler concentrations. The nanoflakes induce interfacial polarization. The intercalation of nanoflakes into the host matrix, leads to the observed trends.

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Section: Introductionmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

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Enhancing the electroactive phases in freestanding flexible films of MoS ₂ / PVDF

Thakur

Jangra

Dam

et al. 2020

Polymer Crystallization

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“…Recently, we have designed the creative systematic design of dynamic Schottky diodes, in which the sliding of metals over semiconductors can produce a direct-current electricity output [19][20][21]. Some similar phenomena based on semiconductors have also been dedicated to converting mechanical energy into electricity, which they attribute to the triboelectricity effect [22][23][24][25][26]. In particular, we have proposed the physical picture of the dynamic Schottky diode based on the rebounding effect under the ultrahigh built-in electric field at the interface, which can break the balance between the drift current and diffusion current and generate an electrical output [19,20].…”

Section: Introductionmentioning

confidence: 99%

Tunable Dynamic Black Phosphorus/Insulator/Si Heterojunction Direct-Current Generator Based on the Hot Electron Transport

Feng

Shen

et al. 2019

Research

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Static heterojunction-based electronic devices have been widely applied because carrier dynamic processes between semiconductors can be designed through band gap engineering. Herein, we demonstrate a tunable direct-current generator based on the dynamic heterojunction, whose mechanism is based on breaking the symmetry of drift and diffusion currents and rebounding hot carrier transport in dynamic heterojunctions. Furthermore, the output voltage can be delicately adjusted and enhanced with the interface energy level engineering of inserting dielectric layers. Under the ultrahigh interface electric field, hot electrons will still transfer across the interface through the tunneling and hopping effect. In particular, the intrinsic anisotropy of black phosphorus arising from the lattice structure produces extraordinary electronic, transport, and mechanical properties exploited in our dynamic heterojunction generator. Herein, the voltage of 6.1 V, current density of 124.0 A/m2, power density of 201.0 W/m2, and energy-conversion efficiency of 31.4% have been achieved based on the dynamic black phosphorus/AlN/Si heterojunction, which can be used to directly and synchronously light up light-emitting diodes. This direct-current generator has the potential to convert ubiquitous mechanical energy into electric energy and is a promising candidate for novel portable and miniaturized power sources in the in situ energy acquisition field.

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“…The self‐driven sensor is mainly composed of electrodes and positive and negative triboelectric materials, the positive and negative charge of the material depends on the strength of the ability of the two materials to avail and lose electrons when they are in contact . As long as two different materials come into contact, the material that attracts the electrons more strongly has a negative charge, and the other material has a positive charge . During the separation‐contact process of the triboelectric material, electrons flow back and forth to form voltage signals.…”

Section: Introductionmentioning

confidence: 99%

Flexible Textile‐Based Self‐Driven Sensor Used for Human Motion Monitoring

Wang

2020

Energy Tech

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Flexible self‐driven sensors can respond to tiny vibrations such as sound waves, blood pressure, heartbeat, etc., and have attracted great attention for their promising applications in wearable devices, in which the electrical signals are triggered by mechanical strength and the coupling of triboelectric and electrostatic induction. Herein, flexible self‐driven sensors assembled with a chitosan (CS) film and polydimethylsiloxane (PDMS) film selected as positive and negative triboelectric layers, respectively, are presented. Conductive fabrics function as electrodes, and polyurethane (PU) foams function as flexible substrates which have advantages of simple integrated structures, ease of manufacturing, and relatively low costs. Tests confirm that the sensor has outstanding flexibility, excellent response performance, and remarkable stability. It is used for real‐time monitoring of human movements, and is based on textiles, providing wearing comfort and is operated without any external power sources as the output voltage of about 30 V can support it. Owing to these advantages, it is believed that a new and convenient strategy to fabricate a novel sensor based on available materials used for human activity detecting and healthcare monitoring is achieved.

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MoS2 triboelectric nanogenerators based on depletion layers

Cited by 40 publications

References 46 publications

Enhancing the electroactive phases in freestanding flexible films of MoS ₂ / PVDF

Enhancing the electroactive phases in freestanding flexible films of MoS ₂ / PVDF

Tunable Dynamic Black Phosphorus/Insulator/Si Heterojunction Direct-Current Generator Based on the Hot Electron Transport

Flexible Textile‐Based Self‐Driven Sensor Used for Human Motion Monitoring

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MoS2 triboelectric nanogenerators based on depletion layers

Cited by 40 publications

References 46 publications

Enhancing the electroactive phases in freestanding flexible films of MoS 2 / PVDF

Enhancing the electroactive phases in freestanding flexible films of MoS 2 / PVDF

Tunable Dynamic Black Phosphorus/Insulator/Si Heterojunction Direct-Current Generator Based on the Hot Electron Transport

Flexible Textile‐Based Self‐Driven Sensor Used for Human Motion Monitoring

Contact Info

Product

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About

Enhancing the electroactive phases in freestanding flexible films of MoS ₂ / PVDF

Enhancing the electroactive phases in freestanding flexible films of MoS ₂ / PVDF