Bithiophene liquid crystal composition with large refractive index and application thereof

Abstract

The invention belongs to the technical field of liquid crystal materials, and discloses a bithiophene liquid crystal composition with a large refractive index and application thereof, the liquid crystal composition at least comprises a compound I shown in a general formula M, the mass fraction of the compound I in the liquid crystal composition is 1-60%, the liquid crystal composition further comprises at least one compound II, and the mass fraction of the compound II in the liquid crystal composition is 1-60%. The mass fraction of the compound II accounts for 1-60% of the liquid crystal composition, the general formula of the compound II is shown as i-1, i-2 or i-3, the liquid crystal composition further comprises at least one compound III, the mass fraction of the compound III accounts for 1-70% of the liquid crystal composition, and the general formula of the compound III is shown as N. The liquid crystal composition shows large refractive index anisotropy (delta n is greater than 0.3), appropriate dielectric constant anisotropy (delta epsilon), high clearing point and excellent low-temperature storage performance, has excellent photo-thermal stability and good anti-UV performance, and is especially suitable for photoelectric devices such as liquid crystal lenses.

Description

technical field [0001] The invention belongs to the technical field of liquid crystal materials and is applied to liquid crystal optoelectronic devices, in particular to a thiophene type liquid crystal composition with high refractive index and its application. Background technique [0002] As a liquid crystal optoelectronic device, liquid crystal lens has excellent comprehensive characteristics such as small size, light weight, low power consumption, and electronically controllable focal length, making it suitable for 3D image processing, augmented reality (AR), virtual reality (VR), and intelligent Focusing glasses and other fields have very important application value. Due to the birefringence of the liquid crystal material, the alignment of the liquid crystal molecules can be controlled under the action of an external electric field, so as to generate a gradient refractive index distribution in the liquid crystal layer. The amount is proportional to the thickness (d) of...

AI Technical Summary

Problems solved by technology

[0003] However, the existing liquid crystal materials not only have poor low-temperature mutual solubility, but also have unsatisfactory anti-UV performance, especially in smart focusing glasses, which cannot meet the needs of outdoor environments.

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