Liquid crystal polymer films with high reflectivity

Luo，Dan1; Shi，Yue2

2021

英语

The growing demand for flexible low-power reflective photonics and display devices has fueled research for high-quality flexible materials with hyper-reflectivity and high stability resistant to environmental influences such that they are of broad working temperature range and excellent mechanical stress insensitivity. Despite the tremendous efforts that have been dedicated to developing cholesteric film materials with hyper-reflectivity or high stability, challenges still remain in achieving both due to the existence of liquid crystal that is susceptible and sensitive to external stimuli, such as temperature or mechanical stress. Herein, we demonstrate a novel flexible film possessing hyper-reflectivity, broad working temperature range, and excellent mechanical stress insensitivity via “washout-refill-assemble” approach by refilling polymer (optical adhesive) into cholesteric film assembled by two cholesteric templates with opposite handedness based on liquid crystal/reactive mesogens, where no liquid crystals exist in the final fabricated multilayer film. These materials show great application potentials in such as low-power flexible reflective displays, and other photonic flexible devices including laser, smart window, color pixels in digital photographs, and colored cladding of variety of objects. In addition, we experimentally demonstrate hyper- reflective, electrically switchable, fast responsive, and colorful reflective displays based on multilayer blue phase liquid crystal (BPLC) films consisting of two single-layer BPLC templates with opposite handedness. Our study on hyper-reflective BPLC film provides an attractive platform for future development including sequential colorful reflective displays and switchable optoelectronic devices.

10.1515/9783110584370-013

Unconventional Liquid Crystals and their Applications

485-502

第一

2-s2.0-85131480123

Scopus

1.Department of Electrical & Electronic Engineering,Southern University of Science and Technology,Shenzhen,1088 Xueyuan Boulevard, Nanshan District Guangdong,518055,China
2.School of Physical Science and Technology,Ningbo University,Ningbo,J818 Fenghua Road, Jiangbei District Zhejiang,315211,China

Luo，Dan,Shi，Yue. Liquid crystal polymer films with high reflectivity. 2021-01-01.