The ac conductivity studies for Cu2O–Bi2O3 glassy system

El-Deen, Lobna M. Sharaf

doi:10.1016/s0254-0584(00)00244-3

Cited by 20 publications

(4 citation statements)

References 12 publications

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“…The temperature dependence of exponent s can be related to the conduction mechanism of a system based on several theoretical models. According to the correlated barrier hopping (CBH) model, the s value increases toward unity as T → 0 K [68]. The quantum mechanical tunneling (QMT) model predicts that the exponent s is temperature independent [69].…”

Section: Resultsmentioning

confidence: 99%

“…The quantum mechanical tunneling (QMT) model predicts that the exponent s is temperature independent [69]. In the overlapping large-polaron tunneling model, s decreases with increasing temperature, exhibits a minimum at a certain temperature and begins to increase with a further increment of temperature [68,70]. The small-polaron hopping model states that s increases with increasing temperature [58].…”

Section: Resultsmentioning

confidence: 99%

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Electrical analysis of amorphous corn starch-based polymer electrolyte membranes doped with LiI

Shukur¹,

Ibrahim²,

Majid³

et al. 2013

Phys. Scr.

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In this work, polymer electrolytes have been prepared by doping starch with lithium iodide (LiI). The incorporation of 30 wt% LiI optimizes the room temperature conductivity of the electrolyte at (1.83 ± 0.47) × 10 −4 S cm −1. Further conductivity enhancement to (9.56 ± 1.19) × 10 −4 S cm −1 is obtained with the addition of 30 wt% glycerol. X-ray diffraction analysis indicates that the conductivity enhancement is due to the increase in amorphous content. The activation energy, E a , of 70 wt% starch-30 wt% LiI electrolyte is 0.26 eV, while 49 wt% starch-21 wt% LiI-30 wt% glycerol electrolyte exhibits an E a of 0.16 eV. Dielectric studies show that all the electrolytes obey non-Debye behavior. The power law exponent s is obtained from the variation of dielectric loss, ε i , with frequency at different temperatures. The conduction mechanism of 70 wt% starch-30 wt% LiI electrolyte can be explained by the correlated barrier hopping model, while the conduction mechanism for 49 wt% starch-21 wt% LiI-30 wt% glycerol electrolyte can be represented by the quantum mechanical tunneling model.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Electrical analysis of amorphous corn starch-based polymer electrolyte membranes doped with LiI

Shukur¹,

Ibrahim²,

Majid³

et al. 2013

Phys. Scr.

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show abstract

“…where τ o is order of atomic vibration period 10 -13 s, k is Boltzmann constant, W m is the height of barrier energy to do hopping, N is the concentration of localized state and constant β = 6kT/W m = 1-s [10,11]. The concentration of localized state, N, β, s and W m tabulated in table 1.…”

Section: Resultsmentioning

confidence: 99%

Electrical Dielectric Permittivity and Conductivity Analysis of Poly(N-Carbazole) (PVK) Blending with Polyvinylpyrrolidone (PVP)

Alias

Zabidi

Ramlee

et al. 2018

KEM

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Electrical dielectric spectra and alternating current (ac) conductivity of blended poly (N-vinlycarbazole) (PVK) with polyvinylpyrrolidone (PVP) at different temperature are investigated. The polymer blends were prepared by dissolving in dimethylformamide (DMF) using drop casting method and further dried in vacuum oven. The dielectric and ac conductivity of each sample was investigated using electrochemical impedance spectroscopy (EIS) method. Dielectric permittivity studies revealed that there are significant changes in the spectra at different temperature. The ac conductivity was further analyzed by using universal power law. The hopping parameter was calculated by using correlated barrier hopping model.

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“…For large value of W M /kT, the exponent s and the hoping distance can be approximated by equation ( 6) and (7), respectively [27,29]: where R min is the cut-off hoping distance. Thus, the values of W M can be calculated from equation ( 6) by using the obtained values of exponent s. The calculated values of W M were then used to calculate R min using equation (7).…”

Section: Resultsmentioning

confidence: 99%

Ac Conductivity Study of Hexanoyl Chitosan-LiCF3SO3-EC-Al2O3 Nanocomposite Polymer Electrolytes

Winie

Hanif

Rosli

et al. 2013

AMR

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Films of hexanoyl chitosan-based polymer electrolyte were prepared by solution casting technique. LiCF3SO3, EC and Al2O3 were employed as the doping salt, plasticizer and filler, respectively. The ac conductivity of the electrolyte system under investigation has been studied in the frequency range from 100 Hz to 1 MHz over the temperature range from 273 K to 333 K. The exponent s in the Jonscher’s universal power law equation was analyzed as a function of temperature. The analysis suggests that the conduction mechanism for the nanocomposite electrolyte system can be interpreted based on the correlated barrier hopping (CBH) model. The ac parameters such as the barrier height, WM and cut-off hopping distance, Rmin were calculated. The values of WM and Rmin are found to decrease with increasing temperature in the same manner as the exponent s.

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The ac conductivity studies for Cu2O–Bi2O3 glassy system

Cited by 20 publications

References 12 publications

Electrical analysis of amorphous corn starch-based polymer electrolyte membranes doped with LiI

Electrical analysis of amorphous corn starch-based polymer electrolyte membranes doped with LiI

Electrical Dielectric Permittivity and Conductivity Analysis of Poly(N-Carbazole) (PVK) Blending with Polyvinylpyrrolidone (PVP)

Ac Conductivity Study of Hexanoyl Chitosan-LiCF<sub>3</sub>SO<sub>3</sub>-EC-Al<sub>2</sub>O<sub>3</sub> Nanocomposite Polymer Electrolytes

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