Using the Field Effect in Silicon to Study Charge Processes in a Nematic Cell

Gritsenko, M. I.; Кучеев, С И

doi:10.1080/15421400590890804

Cited by 2 publications

(1 citation statement)

References 9 publications

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“…When the positive ions are collected at the silicon surface they push away the charge carriers in silicon from the surface layer into bulk. Therefore, the so-called depletion layer [15,16] in silicon is formed. Some part of the voltage applied to the cell drops across the depletion layer having a high resistance that gives rise to a minimum of current.…”

Section: Introductionmentioning

confidence: 99%

Transient current in nematic cells containing a silicon substrate

Кучеев

2008

J. Phys.: Condens. Matter

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Transient currents induced by step voltage or polarity reversal of voltage applied to a liquid crystal cell containing a silicon substrate have been investigated. It is shown that the curves of transient current reveal a minimum for negative polarity of dc voltage relative to a silicon substrate of p-type conductivity. The time of the occurrence of the minimum corresponds to the collection of positive ions from the bulk of the liquid crystal at the silicon surface as a result of drift. This is explained by the formation of a highly resistive layer in the silicon under an electric field of positive ions collected at the silicon surface (a field effect). In polarity reversal experiments, a knowledge of the time of the occurrence of the minimum enables us to estimate the mobility of positive ions, which gives a value of 1.4 × 10(-11) M(2) Bc(-1).

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Section: Introductionmentioning

confidence: 99%

Transient current in nematic cells containing a silicon substrate

Кучеев

2008

J. Phys.: Condens. Matter

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Nano-Objects and Ions in Liquid Crystals: Ion Trapping Effect and Related Phenomena

2015

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Abstract:The presence of ions in liquid crystals is one of the grand challenges that hinder the application of liquid crystals in various devices, which include advanced 3-D and flexible displays, tunable lenses, etc. Not only do they compromise the overall performance of liquid crystal devices, ions are also responsible for slow response, image sticking, and image flickering, as well as many other negative effects. Even highly purified liquid crystal materials can get contaminated during the manufacturing process. Moreover, liquid crystals can degrade over time and generate ions. All of these factors raise the bar for their quality control, and increase the manufacturing cost of liquid crystal products. A decade of dedicated research has paved the way to the solution of the issues mentioned above through merging liquid crystals and nanotechnology. Nano-objects (guests) that are embedded in the liquid crystals (hosts) can trap ions, which decreases the ion concentration and electrical conductivity, and improves the electro-optical response of the host. In this paper, we (i) review recently published works reporting the effects of nanoscale dopants on the electrical properties of liquid crystals; and (ii) identify the most promising inorganic and organic nanomaterials suitable to capture ions in liquid crystals.

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Using the Field Effect in Silicon to Study Charge Processes in a Nematic Cell

Cited by 2 publications

References 9 publications

Transient current in nematic cells containing a silicon substrate

Transient current in nematic cells containing a silicon substrate

Nano-Objects and Ions in Liquid Crystals: Ion Trapping Effect and Related Phenomena

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