Injection of holes into organic molecular solids

Averkiev, N. S.; Zakrevskii, V. A.; Rozhanskii, I. V.; Sudar, N. T.

doi:10.1134/s1063783409050047

Cited by 6 publications

(3 citation statements)

References 14 publications

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“…It is known that they are characterized by high coercive fields, often approaching breakdown fields. In this connection, the general pattern of electrical breakdown in polymer dielectrics in general should be considered [ 37 , 38 , 39 , 40 , 41 ]. With respect to the polymers under consideration, one of the reasons for the observed increase in the negative potential at high fields can be attributed to the transfer of holes from the electrode to the polymer surface [ 39 , 40 , 41 ].…”

Section: Resultsmentioning

confidence: 99%

“…In this connection, the general pattern of electrical breakdown in polymer dielectrics in general should be considered [37][38][39][40][41]. With respect to the polymers under consideration, one of the reasons for the observed increase in the negative potential at high fields can be attributed to the transfer of holes from the electrode to the polymer surface [39][40][41]. The asymmetry of polarization switching with increasing negative potential observed in the thick film of the VDF-TFE copolymer at a field of 120 MV/m should not depend on the shape of the signal of the external field applied to the film according to general considerations.…”

Section: Resultsmentioning

confidence: 99%

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The Effect of Electric Aging on Vinylidene Fluoride Copolymers for Ferroelectric Memory

Kochervinskii,

Buryanskaya,

Osipkov

et al. 2024

Nanomaterials

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Copolymers based on vinylidene fluoride are potential materials for ferroelectric memory elements. The trend in studies showing that a decrease in the degree of crystallinity can lead to an unexpected increase in the electric breakdown field is noted. An analysis of the literature data reveals that in fluorine-containing ferroelectric polymers, when using a bipolar triangular field, the hysteresis loop has an unclosed shape, with each subsequent loop being accompanied by a decrease in the dielectric response. In this work, the effect of the structure of self-polarized films of copolymers of vinylidene fluoride with tetrafluoroethylene and hexafluoropropylene on breakdown processes was studied. The structure of the polymer films was monitored using infrared spectroscopy (IR) and X-ray diffraction. Kelvin probe force microscopy (KPFM) was applied to characterize the local electrical properties of the polymers. For the films of the first copolymer, which crystallize in the polar β-phase, asymmetry in the dielectric response was observed at fields greater than the coercive field. For the films of the copolymers of vinylidene fluoride with hexafluoropropylene, which crystallize predominantly in the nonpolar α-phase, polarization switching processes have also been observed, but at lower electric fields. The noted phenomena will help to identify the influence of the structure of ferroelectric polymers on their electrical properties.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

The Effect of Electric Aging on Vinylidene Fluoride Copolymers for Ferroelectric Memory

Kochervinskii,

Buryanskaya,

Osipkov

et al. 2024

Nanomaterials

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“…The process of formation of positively charged molecular ions in the immediate vicinity of the anode due to the tunneling transition of electrons from the HOMO level of the macromolecule to free electronic levels in the metal can be considered as the injection of holes into the polymer. This process was analyzed in detail in [18]. The electric field lowers and narrows the potential barrier for electrons.…”

Section: Resultsmentioning

confidence: 99%

Volatile products formed during electrical breakdown of polyethylene terephthalate and polypropylene films in high vacuum

V.A.

A.O.

N.T.³

2022

Technical Physics

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In this article we present the results of time-of-flight mass spectrometry of volatile products formed during the electrical breakdown of polyethylene terephthalate and polypropylene polymer films in high vacuum. During the breakdown of films, all the substance emitted from the breakdown channel is a gas of low-molecular products of destruction of macromolecules. The breakdown mass spectra do not contain lines of carbon molecules, the presence of which could indicate carbonation of the channel. To explain the formation of charge carriers, the ionization mechanism of destruction of macromolecules in an electric field is used without the involvement of impact ionization. The final stage of electrical breakdown (the flow of a high-density conduction current) occurs when the critical concentration of traps and electrons ~1024 m-3 is reached. Keywords: electrical breakdown, mass spectrometry, thermodestruction, ionization, macromolecule, trap.

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Electrical and photoelectrical properties of P3HT/n-Si hybrid organic–inorganic heterojunction solar cells

Брус

Zellmeier

Zhang

et al. 2013

Organic Electronics

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Injection of holes into organic molecular solids

Cited by 6 publications

References 14 publications

The Effect of Electric Aging on Vinylidene Fluoride Copolymers for Ferroelectric Memory

The Effect of Electric Aging on Vinylidene Fluoride Copolymers for Ferroelectric Memory

Volatile products formed during electrical breakdown of polyethylene terephthalate and polypropylene films in high vacuum

Electrical and photoelectrical properties of P3HT/n-Si hybrid organic–inorganic heterojunction solar cells

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