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

• Autorzy: Constantin Ganea
• Języki publikacji: EN

Abstrakty

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.

Słowa kluczowe

EN

liquid crystals; electrode polarization; impedance spectroscopy

• Czasopismo: Open Physics
• Rocznik: 2013
• Tom: 11
• Numer: 4
• Strony: 497-511

Daty

wydano

2013-04-01

online

2013-05-22

Twórcy

autor

Constantin Ganea

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

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Identyfikatory

DOI

10.2478/s11534-013-0204-6