Electrode polarization and interface effects in liquid crystal systems with mobile ions: development of a model of bipolar diffusion

• Authors: Constantin Ganea
• Languages of publication: EN

Abstracts

EN

The influence of mobile ions on the results of impedance spectroscopy (dielectric spectroscopy) measurements performed on a liquid crystal cell using the new mathematical model recently described was investigated. This mathematical model reformulates the fundamental equation system of continuity for mobile charge carriers and the Poisson equation using new variables. One makes the following assumptions: ions have different mobilities and diffusion coefficients, there is no generation-recombination process, the equilibrium carrier concentrations are uniform and equal each other, the electrodes are either completely blocking or blocked with adsorption-desorption processes. The final result is the analytical expression of the equivalent admittance for the system, allowing to have a clearer picture of the mobile ions and of the processes that occur at the electrode interface influencing the dielectric behavior.

Keywords

EN

liquid crystals; electrode polarization; impedance spectroscopy

• Publisher: De Gruyter Open
• Journal: Open Physics
• Year: 2013
• Volume: 11
• Issue: 4
• Pages: 497-511

Dates

published

1 - 4 - 2013

online

22 - 5 - 2013

Contributors

author

Constantin Ganea

• National Institute of Materials Physics, RO-077125, Magurele, Romania

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Identifiers

DOI

10.2478/s11534-013-0204-6