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Novel liquid crystal material as well as preparation method and light modulator

A technology for liquid crystal materials and light modulators, which is applied in liquid crystal materials, chemical instruments and methods, optics, etc., can solve the problems of complex preparation process, high production cost, poor stability, etc., and achieves low cost, extremely low cost, and stability. high effect

Inactive Publication Date: 2018-03-20
TSINGHUA BERKELEY SHENZHEN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a new liquid crystal material based on inorganic two-dimensional materials and its preparation method, and to design a matching light modulator, so as to solve the problems of existing organic liquid crystal materials and organic liquid crystal materials. The existing optical modulators have disadvantages such as complex preparation process, high production cost, poor stability, and toxicity.

Method used

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  • Novel liquid crystal material as well as preparation method and light modulator
  • Novel liquid crystal material as well as preparation method and light modulator
  • Novel liquid crystal material as well as preparation method and light modulator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] The assembly process of the optical modulator based on titanium oxide two-dimensional material / water liquid crystal material is as follows (see the stability of liquid crystal material Figure 9 As shown by the white solution in (e), even after standing for 6 months, there is no delamination phenomenon under the rotating speed of 5000 rpm, indicating that the dispersion is very stable):

[0058] (1) The prepared titanium oxide (Ti x o y , where x=0.87, y=2) was prepared as an aqueous dispersion with a concentration of 4g / L, and was further diluted to 0.8g / L with deionized water.

[0059] (2) Put the glass substrate (2 cm X 2 cm) pre-coated with ITO with a thickness of about 250 nanometers into the washing solution of ITO special cleaning agent, and perform ultrasonic treatment for 40 minutes. Then rinse with deionized water several times until the lotion is rinsed off. Then placed in deionized water for 20 minutes of sonication. Remove the glass substrate and dry it...

Embodiment 2

[0066] Optical modulator based on two-dimensional boron nitride / ethylene glycol liquid crystal material (see the stability of liquid crystal material Figure 9 As shown by the white solution in (g), even after standing for 6 months, no delamination occurred).

[0067] On the basis of Example 1, another wide bandgap two-dimensional material, boron nitride material, is also assembled in this example. The basic process is similar and will not be repeated here. The main difference of experimental result and embodiment 1 is summarized as follows: (1) the device structure in the present embodiment adopts figure 1 (a); (2) The solvent adopts the organic solvent ethylene glycol; (3) The off state and the on state of the electro-optic effect are as follows image 3 As shown in (a) and 3(b), the entire device plane will exhibit an overall on-off state.

Embodiment 3

[0069] Optical modulator based on two-dimensional boron nitride / ethylene glycol+water liquid crystal material.

[0070] On the basis of Embodiment 2, this embodiment adjusts the solvent composition of the two-dimensional boron nitride liquid crystal material. The process is similar and will not be repeated. The main differences between the experimental results and Example 2 are summarized as follows: (1) The solvent in this example is a mixed solvent of ethylene glycol+water (60:40 volume ratio). This solvent is the basic solvent of typical antifreeze, and its condensation point is as low as minus 40 degrees, thus breaking through the constraints of high condensation points of pure water and pure ethylene glycol; (2) the off state and on state of the electro-optic effect are respectively Such as Figure 4 As shown in (a) and 4(b), the electro-optic phenomenon of the whole device is significantly improved.

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Abstract

The invention discloses a novel liquid crystal material as well as a preparation method and a light modulator. The novel liquid crystal material is mainly prepared from a stable solution of an inorganic two-dimensional material; the light modulator is mainly composed of a transparent liner, a polaroid, a transparent conductive electrode and a driving power supply; and the stable solution of the inorganic two-dimensional material is sealed in a liquid crystal material accommodation cavity formed by the transparent liner. The invention discloses that an inorganic two-dimensional material is adopted as a liquid crystal activated layer for a first time, the novel liquid crystal material has the advantages of being free of orientated layer, convenient to assemble, adjustable in color and permeation rate, high in on-off ratio, high in stability, low in cost, good in environmental friendliness, and the like, and is applicable to fields such as large-scale electronic curtains, flat displays, mobile phone screens, camera screens, personal electronic and photoelectron equipment screens, game facility screens and light memory storage.

Description

technical field [0001] The invention belongs to the technical field of photoelectric display, and in particular relates to a novel liquid crystal material based on an inorganic two-dimensional material, a preparation method thereof, and an optical modulator prepared by using the novel liquid crystal material. Background technique [0002] The electric field can be used to control the orientation of the liquid crystal, thereby realizing the modulation of the intensity, polarization characteristics and phase of the incident light. The technology of using electric fields to modulate light has been widely used in fields such as flat panel displays and electronic curtains. Existing light modulation devices in the fields of flat panel display and electronic curtains are mainly made of organic liquid crystal materials, including polarizers, analyzers, ITO conductive glass, alignment layers, liquid crystal active layers and glass substrates. It is worth noting that for traditional ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/00G02F1/1333
Inventor 成会明丁宝福刘碧录
Owner TSINGHUA BERKELEY SHENZHEN INST
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