Structure and electrooptical properties of orthoconic antiferroelectric liquid crystalline materials

Dąbrowski, R.; Czupryński, K.; Gąsowska, J.; Tykarska, Marzena; Kula, Przemysław; Dziaduszek, Jerzy; Otón, J. M.; Castillo, P. L.; Benis, N.

doi:10.1117/12.619805

Cited by 2 publications

(2 citation statements)

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“…Thresholdless, V-shaped switching in various structures of chiral smectic materials has become a subject of extensive investigations due to their very attractive properties for display applications [4], suggesting their potential for active matrix (AM) or thin film transistor (TFT) addressing in display devices [5]. Since now current investigations have been based mainly on the Inui and Mitsui mixtures [6], or mixtures containing achiral swallow-tailed compound and antiferroelectric compounds [7][8][9][10]. Known results clearly indicate, that V-shaped switching behavior critically depends on the boundary conditions [11], the thickness of the LC slab and employed frequency of applied electric field.…”

Section: Introductionmentioning

confidence: 99%

A Study of a Binary Liquid-Crystalline Mixtures with the Wide Antiferroelectric Phase

et al. 2006

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Binary mixtures of fluorinated materials having broad antiferroelectric phase have been prepared. A set of phase parameters (phase transition temperatures and enthalpies, the spontaneous polarization and the tilt angle) of pure antiferroelectric components and mixtures prepared using them have been studied. Electrooptical investigations of obtained mixtures have been conducted. An influence of mole mixing ratio of two components on evolution of electrooptical switching from tristable through V-shaped to W-shaped characteristics has been observed. The thresholdless switching of a mixture with specific mixing ratio has been ascribed as the result of the formation of frustrated phase in the medium.

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Section: Introductionmentioning

confidence: 99%

A Study of a Binary Liquid-Crystalline Mixtures with the Wide Antiferroelectric Phase

et al. 2006

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“…Ferroelectric mixture W204d, prepared at the Military Uni− versity of Technology (MUT) [8], was chosen for measure− ments because of its broad SmA* phase, with well detec− table soft mode [9]. The soft mode relaxation frequency f S seems to vary from 2-3 MHz up to 100 kHz.…”

Section: Introductionmentioning

confidence: 99%

How to determine parameters of soft mode from dielectric spectroscopy performed using cells with ITO electrodes?

Perkowski

2011

Opto-Electronics Review

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Indium tin oxide (ITO) electrodes are widely used for liquid crystal applications as well as for measuring cells. Unfortunately, ITO layer possesses its own non zero resistivity R, which produces (with the cell capacity C0) the cut-off frequency f0 of RC0 circuit. From this reason, dielectric spectroscopy for high frequencies cannot be performed directly. The limits of classical method of extracting high frequency losses are shortly discussed. The new method of extracting high frequency losses is used for the first time for the experimental data. The new method can also evaluate the shrinkage of measuring cell gap after filling with liquid crystal.

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Structure and electrooptical properties of orthoconic antiferroelectric liquid crystalline materials

Cited by 2 publications

References 5 publications

A Study of a Binary Liquid-Crystalline Mixtures with the Wide Antiferroelectric Phase

A Study of a Binary Liquid-Crystalline Mixtures with the Wide Antiferroelectric Phase

How to determine parameters of soft mode from dielectric spectroscopy performed using cells with ITO electrodes?

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