Effect of poly(vinylidene fluoride) interface layer on charge storage and residual potential in amorphous selenium films

We developed solution-processed hybrid photodetectors with a poly (9-vinylcarbazole)/zinc oxide nanoparticle photoactive layer and a poly (vinylidene fluoride-co-trifluoroethylene) ferroelectric copolymer buffer layer on flexible plastic substrates. The presence of a ferroelectric-poling interface layer significantly enhanced the charge transfer and responsivity of the photodetectors under ultraviolet (UV, 365 nm) light exposure. The responsivity of the device reached 250 mA/W at a reverse bias of 5 V and incident light intensity of 27.5 μW/cm2. This responsivity was four times higher than that of a device without the ferroelectric copolymer layer (64 mA/W) under the same conditions. The response time of the device to incident UV light also improved from 322 to 34 ms with the addition of the ferroelectric copolymer layer. In addition, the flexible device exhibited a stable performance in an air environment up to a maximum strain of 0.3 under bending stress. Finally, a UV-light-responsive memory device was successfully fabricated by using the developed hybrid photodetector and liquid crystals. This device showed a colour change from white to black upon UV illumination, and the on-state of the device was maintained for 30 s without light exposure owing to the polarization of poly (vinylidene fluoride-co-trifluoroethylene).

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Photostructural defect states and residual potential in chlorine and arsenic doped amorphous selenium films

Applied Physics Letters ◽

10.1063/1.108362 ◽

1992 ◽

Vol 61 (16) ◽

pp. 1915-1917 ◽

Cited By ~ 8

Author(s):

Suresh Chand ◽

G. D. Sharma ◽

R. C. Batheja ◽

Subhas Chandra

Keyword(s):

Amorphous Selenium ◽

Defect States ◽

Selenium Films ◽

Residual Potential

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Effect of polyvinylcarbazole barrier layer on charge storage in amorphous selenium films

Applied Physics Letters ◽

10.1063/1.124460 ◽

1999 ◽

Vol 75 (5) ◽

pp. 621-623 ◽

Cited By ~ 4

Author(s):

Suresh Chand ◽

G. D. Sharma ◽

S. Dwivedi

Keyword(s):

Barrier Layer ◽

Amorphous Selenium ◽

Charge Storage ◽

Selenium Films

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Electrospun poly(vinylidene fluoride) membranes functioning as static charge storage device with controlled crystalline phase by inclusions of nanoscale graphite platelets

Journal of Materials Science ◽

10.1007/s10853-017-1723-0 ◽

2017 ◽

Vol 53 (4) ◽

pp. 3038-3048 ◽

Cited By ~ 6

Author(s):

Zhao-Xia Huang ◽

Xiaoxiao Liu ◽

Jiawei Wu ◽

Shing-Chung Wong ◽

George G. Chase ◽

...

Keyword(s):

Crystalline Phase ◽

Vinylidene Fluoride ◽

Storage Device ◽

Charge Storage ◽

Static Charge ◽

Poly Vinylidene Fluoride ◽

Charge Storage Device

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Graphene/poly(vinylidene fluoride) dielectric composites with polydopamine as interface layers

Science and Engineering of Composite Materials ◽

10.1515/secm-2015-0084 ◽

2017 ◽

Vol 24 (3) ◽

pp. 327-333 ◽

Cited By ~ 1

Author(s):

Hairong Li ◽

Chenglong Xu ◽

Zongyi Chen ◽

Ming Jiang ◽

Chuanxi Xiong

Keyword(s):

Dielectric Permittivity ◽

Vinylidene Fluoride ◽

Interface Layer ◽

Low Loss ◽

Dielectric Characteristics ◽

High Dielectric Permittivity ◽

Reduced Graphene ◽

Poly Vinylidene Fluoride ◽

High Dielectric ◽

Interface Layers

AbstractA poly(vinylidene fluoride) (PVDF) nanocomposite incorporated with polydopamine-coated reduced graphene oxide (rGO@PDOPA) nanosheets has been developed with high dielectric permittivity and low loss for electricity storage applications. Structural analysis indicates that PDOPA was successfully anchored onto rGOs through non-covalent linkage under mild conditions. The presence of PDOPA layer between rGO and PVDF can not only prevent the agglomeration and direct contact of original rGOs but also enhance the interaction between PVDF and rGO and microcapacitor formation. Compared to rGO/PVDF composites, higher dielectric permittivity and lower loss factor were achieved simultaneously in rGO@PDOPA/PVDF nanocomposites at low and moderate frequencies. The PDOPA interface layers are effective in modifying the dielectric characteristics of the composites to increase the dielectric permittivity without the introduction of loss mechanisms. This study demonstrates that PDOPA is an ideal interface layer for the development of new percolative dielectric composites with high dielectric permittivity and low loss.

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No Interfacial Layer for PEDOT Electrodes on PVDF: Characterization of Reactions at the Interface P(VDF/TrFE)/Al and P(VDF/TrFE)/PEDOT:PSS

MRS Proceedings ◽

10.1557/proc-0997-i06-02 ◽

2007 ◽

Vol 997 ◽

Author(s):

Klaus Mueller ◽

Dipanka Mandal ◽

Dieter Schmeisser

Keyword(s):

Photoelectron Spectroscopy ◽

Electrode Materials ◽

Vinylidene Fluoride ◽

Chemical Interaction ◽

Conductive Polymer ◽

Interface Reaction ◽

Interface Layer ◽

Lower Reactivity ◽

Poly Vinylidene Fluoride ◽

Copolymer Poly

AbstractWith photoelectron spectroscopy, we study the interface chemistry of the copolymer poly(vinylidene fluoride trifluoroethylene) (P(VDF-TrFE)) and different electrode materials. We compare the interfaces aluminum/P(VDF-TrFE) and PEDOT:PSS/P(VDF-TrFE). PEDOT:PSS is a conductive polymer (Poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate)). The data sug-gest that we have an interface layer for electrodes, made of aluminum. An interface reaction occurs in both cases: for aluminum as top and as bottom electrode. In contrast, the organic PE-DOT:PSS electrode shows no chemical interaction with the P(VDF-TrFE) polymer. The much lower reactivity of organic electrodes, compared to aluminum, gives a direct hint to im-proved functional properties of thin organic ferroelectric films.

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Piezoelectric β-polymorph formation of new textiles by surface modification with coating process based on interfacial interaction on the conformational variation of poly (vinylidene fluoride) (PVDF) chains

The European Physical Journal Applied Physics ◽

10.1051/epjap/2020200158 ◽

2020 ◽

Vol 91 (3) ◽

pp. 31301

Author(s):

Nabil Chakhchaoui ◽

Rida Farhan ◽

Meriem Boutaldat ◽

Marwane Rouway ◽

Adil Eddiai ◽

...

Keyword(s):

High Efficiency ◽

Vinylidene Fluoride ◽

Research Work ◽

Research Area ◽

Interfacial Interaction ◽

Tetraethyl Orthosilicate ◽

Poly Vinylidene Fluoride ◽

Carbon Nanofillers ◽

The Impact ◽

Advanced Applications

Novel textiles have received a lot of attention from researchers in the last decade due to some of their unique features. The introduction of intelligent materials into textile structures offers an opportunity to develop multifunctional textiles, such as sensing, reacting, conducting electricity and performing energy conversion operations. In this research work nanocomposite-based highly piezoelectric and electroactive β-phase new textile has been developed using the pad-dry-cure method. The deposition of poly (vinylidene fluoride) (PVDF) − carbon nanofillers (CNF) − tetraethyl orthosilicate (TEOS), Si(OCH2CH3)4 was acquired on a treated textile substrate using coating technique followed by evaporation to transform the passive (non-functional) textile into a dynamic textile with an enhanced piezoelectric β-phase. The aim of the study is the investigation of the impact the coating of textile via piezoelectric nanocomposites based PVDF-CNF (by optimizing piezoelectric crystalline phase). The chemical composition of CT/PVDF-CNC-TEOS textile was detected by qualitative elemental analysis (SEM/EDX). The added of 0.5% of CNF during the process provides material textiles with a piezoelectric β-phase of up to 50% has been measured by FTIR experiments. These results indicated that CNF has high efficiency in transforming the phase α introduced in the unloaded PVDF, to the β-phase in the case of nanocomposites. Consequently, this fabricated new textile exhibits glorious piezoelectric β-phase even with relatively low coating content of PVDF-CNF-TEOS. The study demonstrates that the pad-dry-cure method can potentially be used for the development of piezoelectric nanocomposite-coated wearable new textiles for sensors and energy harvesting applications. We believe that our study may inspire the research area for future advanced applications.

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