Uniform, large surface-area polarization by modifying corona-electrodes geometry

Tansel, Tunay; Rusen, Selmin Ener; Rüşen, Aydın

doi:10.1063/1.4773566

Cited by 9 publications

(4 citation statements)

References 27 publications

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“…where d 31 is the piezoelectric efficiency; E (4–6 GPa) is the Young’s modulus of P(VDF-TrFE); γ is a geometry effect parameter, which is introduced to evaluate the fringe effect with A E ′ = γA E ; A E is the effective working area of the flexible piezoelectric thin film, A E ′ is the effective poling area47; f is the working frequency, ε 11 is the normal strain along x 1 direction with stretching radius R , ; R ′ is the inner resistance of P(VDF = TrFE) film ( R, h s , h P(VDF-TrFE) are shown in Fig. 1).…”

Section: Resultsmentioning

confidence: 99%

A flexible triboelectric-piezoelectric hybrid nanogenerator based on P(VDF-TrFE) nanofibers and PDMS/MWCNT for wearable devices

Wang

Yang

Liu

et al. 2016

Sci Rep

205

119

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This paper studied and realized a flexible nanogenerator based on P(VDF-TrFE) nanofibers and PDMS/MWCNT thin composite membrane, which worked under triboelectric and piezoelectric hybrid mechanisms. The P(VDF-TrFE) nanofibers as a piezoelectric functional layer and a triboelectric friction layer are formed by electrospinning process. In order to improve the performance of triboelectric nanogenerator, the multiwall carbon nanotubes (MWCNT) is doped into PDMS patterned films as the other flexible friction layer to increase the initial capacitance. The flexible nanogenerator is fabricated by low cost MEMS processes. Its output performance is characterized in detail and structural optimization is performed. The device’s output peak-peak voltage, power and power density under triboelectric mechanism are 25 V, 98.56 μW and 1.98 mW/cm3 under the pressure force of 5 N, respectively. The output peak-peak voltage, power and power density under piezoelectric working principle are 2.5 V, 9.74 μW, and 0.689 mW/cm3 under the same condition, respectively. We believe that the proposed flexible, biocompatible, lightweight, low cost nanogenerator will supply effective power energy sustainably for wearable devices in practical applications.

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Section: Resultsmentioning

confidence: 99%

A flexible triboelectric-piezoelectric hybrid nanogenerator based on P(VDF-TrFE) nanofibers and PDMS/MWCNT for wearable devices

Wang

Yang

Liu

et al. 2016

Sci Rep

205

119

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show abstract

“…[ 17 ] Third, when the high corona voltages over 12 kV are applied to the P(VDF‐TrFE), the polarization of P(VDF‐TrFE) is deteriorated by damages and thus lifetimes of samples are decreased. [ 77,78 ]…”

Section: Resultsmentioning

confidence: 99%

“…[17] Third, when the high corona voltages over 12 kV are applied to the P(VDF-TrFE), the polarization of P(VDF-TrFE) is deteriorated by damages and thus lifetimes of samples are decreased. [77,78] In order to compare the results to the actual state of the art of SiN x and SiO 2 films, the surface recombination velocity, S, was determined by the following well-known equation; [70,79,80] 1…”

Section: Passivation Effect Of P(vdf-trfe) On Simentioning

confidence: 99%

Ambipolar Passivated Back Surface Field Layer for Silicon Photovoltaics

Kang

Park

Jeong

et al. 2020

Adv Funct Materials

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The suppression of surface recombination is of primary importance for realizing efficient silicon photovoltaics, which is usually achieved by introducing passivation or back-surface field (BSF) layers. In this study, it is demonstrated for the first time that self-assembled, ferroelectric, and organic thin-films can be used as passivating BSF layers for both n-and p-type Si solar cells by switching polarization. The n-Si/PEDOT:PSS heterojunction solar cell with the ambipolar passivated BSF exhibits an efficiency of 18.37%, which is a record-high efficiency for organic semiconductor/n-Si heterojunction solar cells. In addition, homojunction p-Si solar cells with the ambipolar passivated BSF yield superior performance compared to aluminium-BSF cells. Finitedifference time-domain simulations reveal that the electric field due to the ferroelectric layer extends deep into the backside of Si, causing band bending and, consequently, reducing surface recombination. Moreover, the solar cell with passivated BSF maintains > 95% of its initial performance even after 1000 h of the standard damp heat test. This work endows Si-based photovoltaics with the superior passivation and high-performance which were previously exclusive to inorganics.

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“…Observation of switching under such a mode would rule out the formation of a soft (top) metal electrode and the influence of the Schottky barrier during the switching in the MAPI film while yielding a memristor behavior. In contrast to contact poling, the noncontact mode or corona poling is considered to be more capable of inducing the polarization effect …”

Section: Resultsmentioning

confidence: 99%

Noncontact Tunneling in Methylammonium Lead Iodide (CH₃NH₃PbI₃): Evidence of Bipolar Resistive Switching through Defect Migration

Paramanik

Chatterjee

Pal

2020

ACS Appl. Electron. Mater.

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We present resistive switching characteristics of methylammonium lead iodide (CH3NH3PbI3) films through a noncontact electrical poling process toward memristive applications. The noncontact nature of the poling process was induced with a scanning tunneling microscope tip, so that the formation of metal filaments could be ruled out. The perovskite films were seen to exhibit resistive switching upon application of a voltage pulse in the presence of a high-resistive state and a low-resistive state; the magnitude and the width of the voltage pulse were varied to deliberate on the parameters necessary to activate the switching phenomenon. Among the underlying mechanisms proposed so far, the formation and the subsequent rupture of metal-like filaments because of the migration of iodide vacancies have been identified to be responsible for resistive switching in the perovskite material.

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Uniform, large surface-area polarization by modifying corona-electrodes geometry

Cited by 9 publications

References 27 publications

A flexible triboelectric-piezoelectric hybrid nanogenerator based on P(VDF-TrFE) nanofibers and PDMS/MWCNT for wearable devices

A flexible triboelectric-piezoelectric hybrid nanogenerator based on P(VDF-TrFE) nanofibers and PDMS/MWCNT for wearable devices

Ambipolar Passivated Back Surface Field Layer for Silicon Photovoltaics

Noncontact Tunneling in Methylammonium Lead Iodide (CH₃NH₃PbI₃): Evidence of Bipolar Resistive Switching through Defect Migration

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Uniform, large surface-area polarization by modifying corona-electrodes geometry

Cited by 9 publications

References 27 publications

A flexible triboelectric-piezoelectric hybrid nanogenerator based on P(VDF-TrFE) nanofibers and PDMS/MWCNT for wearable devices

A flexible triboelectric-piezoelectric hybrid nanogenerator based on P(VDF-TrFE) nanofibers and PDMS/MWCNT for wearable devices

Ambipolar Passivated Back Surface Field Layer for Silicon Photovoltaics

Noncontact Tunneling in Methylammonium Lead Iodide (CH3NH3PbI3): Evidence of Bipolar Resistive Switching through Defect Migration

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Noncontact Tunneling in Methylammonium Lead Iodide (CH₃NH₃PbI₃): Evidence of Bipolar Resistive Switching through Defect Migration