Dielectric permittivity and electric modulus of polyethylene oxide (PEO)–LiClO4 composite electrolytes

2012 ◽  
Vol 12 (2) ◽  
pp. 539-543 ◽  
Author(s):  
A. Karmakar ◽  
A. Ghosh
Keyword(s):  
Dielectric Permittivity ◽  
Polyethylene Oxide ◽  
Electric Modulus ◽  
Composite Electrolytes

Identification of relaxation processes in pure polyethylene oxide (PEO) films by the dielectric permittivity and electric modulus formalisms

2018 ◽  
Vol 29 (7) ◽  
pp. 1974-1987 ◽  
Author(s):  
Ahmad Telfah ◽  
Mousa M. Abdul-Gader Jafar ◽  
Inshad Jum'h ◽  
Mais Jamil A. Ahmad ◽  
Jörg Lambert ◽  
...  
Keyword(s):  
Dielectric Permittivity ◽  
Polyethylene Oxide ◽  
Electric Modulus ◽  
Relaxation Processes

Complex dielectric permittivity, electric modulus and electrical conductivity analysis of Au/Si3N4/p-GaAs (MOS) capacitor

2021 ◽  
Author(s):  
Sema Türkay ◽  
Adem Tataroğlu
Keyword(s):  
Electrical Conductivity ◽  
Dielectric Permittivity ◽  
Electric Modulus ◽  
Arrhenius Equation ◽  
Rf Magnetron Sputtering ◽  
Oxide Semiconductor ◽  
Complex Dielectric Permittivity ◽  
Mos Capacitor ◽  
Universal Power Law ◽  
Complex Electrical Conductivity

AbstractRF magnetron sputtering was used to grow silicon nitride (Si3N4) thin film on GaAs substrate to form metal–oxide–semiconductor (MOS) capacitor. Complex dielectric permittivity (ε*), complex electric modulus (M*) and complex electrical conductivity (σ*) of the prepared Au/Si3N4/p-GaAs (MOS) capacitor were studied in detail. These parameters were calculated using admittance measurements performed in the range of 150 K-350 K and 50 kHz-1 MHz. It is found that the dielectric constant (ε′) and dielectric loss (ε″) value decrease with increasing frequency. However, as the temperature increases, the ε′ and ε″ increased. Ac conductivity (σac) was increased with increasing both temperature and frequency. The activation energy (Ea) was determined by Arrhenius equation. Besides, the frequency dependence of σac was analyzed by Jonscher’s universal power law (σac = Aωs). Thus, the value of the frequency exponent (s) were determined.

Investigation of the light-soaking effect in organic solar cells using dielectric permittivity and electric modulus approaches

2018 ◽  
Vol 52 ◽  
pp. 32-41 ◽  
Author(s):  
J. Symonowicz ◽  
M. Morawski ◽  
M. Dusza ◽  
P. Peksa ◽  
A. Sieradzki ◽  
...  
Keyword(s):  
Solar Cells ◽  
Dielectric Permittivity ◽  
Organic Solar Cells ◽  
Electric Modulus

Lithium Ion Pathway within Li7 La3 Zr2 O12 -Polyethylene Oxide Composite Electrolytes

2016 ◽  
Vol 128 (40) ◽  
pp. 12726-12730 ◽  
Author(s):  
Jin Zheng ◽  
Mingxue Tang ◽  
Yan-Yan Hu
Keyword(s):  
Polyethylene Oxide ◽  
Lithium Ion ◽  
Composite Electrolytes ◽  
Oxide Composite

Ionic Space Charge Relaxation and High Dielectric Permittivity in Polyethylene Oxide

1998 ◽  
Vol 548 ◽  
Author(s):  
A. Wagner ◽  
H. Kliem
Keyword(s):  
Relative Humidity ◽  
Dielectric Permittivity ◽  
Space Charge ◽  
Polyethylene Oxide ◽  
Transition Probability ◽  
Low Frequency ◽  
Frequency Range ◽  
Molecular Weights ◽  
Thermally Activated ◽  
High Dielectric

ABSTRACTThin films (0.3μm to 11.2 μm) of Polyethylene Oxide (PEO) with molecular weights from 6 × 103 to 4 × 105 were prepared from aqueous solutions by a spin technique as AI-PEO-AI structures, or as AI-PEO-Si structures. Dielectric measurements (capacitance and loss angle) were carried out in a frequency range 3 mHz ≤ f ≤ 1 MHz in atmospheres of different relative humidity (0% r.h. to 75% r.h.) and at different temperatures (293 K to 323 K). The nominal dielectric permittivity exhibits a remarkable dependence on the sample thickness and the relative humidity. We find a true volume polarization in the high frequency range and a thermally activated relaxation process in the low frequency range, whose time constant is shifted towards high frequencies with increasing r.h.. It is considered that due to the absorbed dipolar water molecules chemical bonds within the sample are broken and quasi-free ions are generated. These ions move through the sample to the electrode interfaces and form an ionic space charge. We assume that at the PEO-Al interface an oxide layer is formed, which is impermeable for these ions. The transit times and the drift velocities of the ions are almost independent of the electric field strength in the low-field limit. Therefore we conclude that the movement of the ions can be described by a multiwell potential model, where the transition probability between neighbored wells is thermally activated.

Sign in / Sign up

Export Citation Format

Share Document