Enhanced Bandwidth Broadening of Infrared Reflector Based on Polymer Stabilized Cholesteric Liquid Crystals with Poly(N-vinylcarbazole) Used as Alignment Layer.

ABSTRACT: Alignment layer plays a critical role on liquid crystal (LC) conformation for most LC devices. Normally, polyimide (PI) or polyvinyl alcohol (PVA), characterized by their outstanding thermal and electrical properties, have been widely applied as the alignment layer to align LC molecules. Here, we used a semi-conductive material poly(N-vinylcarbazole) (PVK) as the alignment layer to fabricate the cholesteric liquid crystal (CLC) device and the polymer-stabilized cholesteric liquid crystals (PSCLC)-based infrared (IR) reflectors. In the presence of ultraviolet (UV) irradiation, there are hole-electron pairs generated in the PVK layer, which neutralizes the impurity electrons in the LC-PVK junction, resulting in the reduction in the built-in electric field in the LC device. Therefore, the ope

SUBMITTER: Zhang L 

PROVIDER: S-EPMC8309408 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature