Polarization profiles of electron-beam polarized VDF-TrFE copolymer films

Schilling, D.; Glatz-Reichenbach, J.; Dransfeld, Klaus; Bihler, E.; Eisenmenger, Wolfgang

doi:10.1109/ceidp.1990.201327

Cited by 2 publications

(1 citation statement)

References 8 publications

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“…where ε r is the dielectric constant, ε 0 the permittivity of the vacuum, z the coordinate in thickness direction of the material, and t the time during poling. The influence of ρ(z,t) on the polarization behavior of pure P(VDF) and P(VDF-TrFE) [41][42][43], as well as P(VDF-TrFE) composites [21], has already been described in various studies. Based upon this research, it is assumed that the resulting local increase in the field strength in parts of the sample caused by the emerging charge carrier distribution during poling led to the enhanced dipole alignment (i.e., polarization).…”

Section: Ferroelectric Propertiesmentioning

confidence: 99%

Ferroelectric Properties of Polymer–Semiconductor Hybrid Material or Composite under Optical Excitation

Kober,

Smykalla,

Ploss

et al. 2024

Polymers

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Polymer–semiconductor hybrid materials or composites have been investigated with respect to their microstructure, optical, photoconductive, and ferroelectric properties. For this purpose, either CdSe quantum dots or (Cd:Zn)S microparticles were dispersed in poly(vinylidenefluoride-trifluoroethylene) solution and hot pressed to films. In both material systems, the electrical conductivity and the polarization behavior could be controlled by the intensity of the optical excitation. The simultaneous high optical transparency of the CdSe quantum-dot-based hybrid materials makes them particularly interesting for applications in the field of flexible, high-resolution sensors.

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Section: Ferroelectric Propertiesmentioning

confidence: 99%

Ferroelectric Properties of Polymer–Semiconductor Hybrid Material or Composite under Optical Excitation

Kober,

Smykalla,

Ploss

et al. 2024

Polymers

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Charge distribution and transport in polymers

Sessler¹

1997

IEEE Trans. Dielect. Electr. Insul.

122

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Experimental work on charge distributions and charge transport in polymer films is reviewed. For studying the charge distributions in the thickness dimension, thermal or acoustic techniques are used with resolutions down to N 1 pm. The polymer samples usually are charged with corona, electron beam or thermal methods. Observation of the change of charge and polarization distributions with time allows one to draw conclusions about charge transport and charge injection phenomena. In some cases theoretical models have been established, based on excess-charge drift due to a finite carrier mobility and on charge compensation due to intrinsic or radiation-induced conductivity Other models are concerned with the interaction of injected or intrinsic space charge with a dipole polarization. Comparisons of measured and calculated charge distributions and their change with time show the applicability of these models and shed new light on charge trapping and charge transport phenomena.

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Polarization profiles of electron-beam polarized VDF-TrFE copolymer films

Cited by 2 publications

References 8 publications

Ferroelectric Properties of Polymer–Semiconductor Hybrid Material or Composite under Optical Excitation

Ferroelectric Properties of Polymer–Semiconductor Hybrid Material or Composite under Optical Excitation

Charge distribution and transport in polymers

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