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Control of Transmittance by Thermally Induced Phase Transition in Guest–Host Liquid Crystals
Author(s) -
Oh SeungWon,
Kim SangHyeok,
Yoon TaeHoon
Publication year - 2018
Publication title -
advanced sustainable systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.499
H-Index - 24
ISSN - 2366-7486
DOI - 10.1002/adsu.201800066
Subject(s) - transmittance , liquid crystal , opacity , materials science , phase transition , optics , absorption (acoustics) , phase (matter) , optoelectronics , crystal (programming language) , chemistry , condensed matter physics , physics , organic chemistry , computer science , composite material , programming language
Guest–host liquid crystal (GHLC) consists of host liquid crystal and guest dichroic dye. It can be switched between the transparent and opaque states by controlling the light absorption. In this paper, transmission control via the phase transition in GHLCs is presented. The smectic A, nematic, and isotropic phases as the high‐, mid‐, and low‐transmittance states of a GHLC cell are used, respectively, to control the transmittance. It is demonstrated that the proposed GHLC cell can be used as a self‐shading smart window for energy saving, which allows people to see through it even when it is darkened.