Space Charge Measurement Technologies and Their Potential Applications

doi:10.18494/sam.2017.1506

Cited by 5 publications

(4 citation statements)

References 31 publications

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“…Fig 4a shows the relative permittivity (ɛ 𝑟𝑟 ) of the pristine PVDF-TrFE and the AGO nanocomposite films in the frequency range from 300 Hz to 5 MHz. All the samples demonstrated a notable decrease in the relative permittivity as frequency increases, which is attributed to the reduction of the space charge polarization effect (known as interfacial polarization) 40,41 . As can be observed, an improvement in the relative permittivity of all the AGO nanocomposites is notable within the whole frequency range, when compared to the pristine PVDF-TrFE.…”

Section: -3 Dielectric Performancementioning

confidence: 98%

Interfacial Engineering of PVDF‐TrFE toward Higher Piezoelectric, Ferroelectric, and Dielectric Performance for Sensing and Energy Harvesting Applications

Abdolmaleki

Haugen

Buhl³

et al. 2023

Advanced Science

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The electrical properties of pristine fluoropolymers are inferior due to their low polar crystalline phase content and rigid dipoles that tend to retain their fixed moment and orientation. Several strategies such as electrospinning, electrohydrodynamic pulling, and template-assisted growing have been proven to enhance the electrical properties of fluoropolymers, however, these techniques are mostly very hard to scale-up and expensive. Here, we propose a facile interfacial engineering approach based on amine-functionalized graphene oxide (AGO) to manipulate the intermolecular interactions in poly (vinylidenefluoride-trifluoroethylene) (PVDF-TrFE) to induce β-phase formation, enlarge the lamellae dimensions, and align the micro-dipoles. The coexistence of primary amine and hydroxyl groups on AGO nanosheets offers strong hydrogen bonding with fluorine atoms, which facilitates domain alignment, resulting in an exceptional remnant polarization of 11.3 µC cm -2 . PVDF-TrFE films with 0.1 wt% AGO demonstrated voltage coefficient, energy density, and energy-harvesting figure of merit values of 0.30 Vm N -1 , 4.75 J cm -3 , and 14 pm 3 J -1 , respectively, making it outstanding compared with state-of-the-art ceramic-free ferroelectric films. We believe this work can open-up new insights towards structural and morphological tailoring of fluoropolymers to enhance their electrical and electromechanical performance and pave the way for their industrial deployment in next-generation wearables and human-machine interfaces.

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Section: -3 Dielectric Performancementioning

confidence: 98%

Interfacial Engineering of PVDF‐TrFE toward Higher Piezoelectric, Ferroelectric, and Dielectric Performance for Sensing and Energy Harvesting Applications

Abdolmaleki

Haugen

Buhl³

et al. 2023

Advanced Science

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show abstract

“…Fig 5a shows the relative permittivity (ɛ 𝑟 ) of the pristine PVDF-TrFE and the AGO nanocomposite films in the frequency range from 300 Hz to 5 MHz. All the samples demonstrated a notable decrease in the relative permittivity as frequency increases, which is attributed to the reduction of the space charge polarization effect (known as interfacial polarization) 40,41 . As can be observed, an improvement in the relative permittivity of all the AGO nanocomposites is notable within the whole frequency range, when compared to the pristine PVDF-TrFE.…”

Section: -3 Dielectric Performancementioning

confidence: 98%

A novel versatile nanocomposite film with outstanding piezoelectric, ferroelectric, and dielectric properties

Abdolmaleki

Haugen

Buhl

et al. 2022

Preprint

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The current global chip shortage and energy crisis has prompted research community to investigate alternative electronic and energy materials with improved performance. Here, we propose a versatile and easy to fabricate ceramic-free nanocomposite film, based on fluoropolymers and amine-functionalized graphene oxide (AGO) nanosheets with great application potentials in non-resonant energy harvesters, voltage-generating sensors, and ferroelectric random access memories. The electrical and electromechanical properties of pristine fluoropolymers are inferior due to their low polar crystalline phase content, leading to weak spontaneous and remanent polarization. By using intermolecular anchoring strategy as an interfacial coupling mechanism, we have achieved outstanding voltage coefficient, energy density, and energy-harvesting figure of merit values of 0.30 Vm/N, 4.75 J/cm3, and 14 pm3/J, respectively, making the work one of the best ceramic-free nanocomposites reported so far. Employing differential calorimetry, wide-angle and small-angle X-ray scattering analyses, we demonstrate that AGO incorporation leads to formation of bigger crystallites and higher β/α ratio, which translates into remarkably high remnant polarization of 11.3 µC/cm2. We believe this work can open up new insights towards structural and morphological tailoring of fluoropolymers to enhance their electrical and electromechanical performance and pave the way for their industrial deployment in next-generation wearable electronics and human-machine interfaces.

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“…Transient laser-induced voltaic response in a partially illuminated dielectric core Xinyang Miao 1,2 , Jing Zhu 2 , Yizhang Li 2 , Honglei Zhan 2 , Kun Zhao 1,2 and Wenzheng Yue 1 the anisotropic electrical response of a dielectric shale core were also characterized under the UV laser irradiation [22]. Experimental study of the destruction of carbonate rock was also performed using a KrF laser beam monitored by the LIV method [23].…”

Section: Laser Physicsmentioning

confidence: 99%

“…In recent years, a number of methods have been developed for measuring the charge distributions in solid insulating mat erials owing to their potential applications in sensors and equipment (e.g. pressure pulses, electron beams, thermal pulses, and so on) [1]. Being used as the source of pressure pulses and currents, laser interaction with solids has been the subject of numerous studies [2].…”

Section: Introductionmentioning

confidence: 99%

Transient laser-induced voltaic response in a partially illuminated dielectric core

Miao

Zhu

et al. 2018

Laser Phys.

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Ultraviolet laserinduced voltage (LIV) measurements were performed on dielectric rock cores. The LIV response in the dielectric core samples were measured with the laser spot partially irradiated at the surfaces under a bias of 210 V, and the accumulation of interface charges was considered resulting in the transient voltage response. The voltage waveforms at the shale and sandstone were different in maximum values (V p ) and full width at half maximum in accordance with the components and structures. V p , as a function of spot position, depended on the distance between the laser spot and the electrode planes. In addition, ablation was observed in the rock surface irradiated by the pulsed laser, which was associated with rapid buildup of electrons and generation of intrinsic defects in the cores. Therefore, the LIV method can promote the understanding of the interaction between intense laser and dielectric materials.

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Space Charge Measurement Technologies and Their Potential Applications

Cited by 5 publications

References 31 publications

Interfacial Engineering of PVDF‐TrFE toward Higher Piezoelectric, Ferroelectric, and Dielectric Performance for Sensing and Energy Harvesting Applications

Interfacial Engineering of PVDF‐TrFE toward Higher Piezoelectric, Ferroelectric, and Dielectric Performance for Sensing and Energy Harvesting Applications

A novel versatile nanocomposite film with outstanding piezoelectric, ferroelectric, and dielectric properties

Transient laser-induced voltaic response in a partially illuminated dielectric core

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