Design of chiral guest-host liquid crystals for a transmittance-tunable smart window
SCIE
SCOPUS
- Title
- Design of chiral guest-host liquid crystals for a transmittance-tunable smart window
- Authors
- LEE, JAEWOOK; SEUNGMIN, NAM; CHOI, SU SEOK
- Date Issued
- 2022-07
- Publisher
- Optical Society of America
- Abstract
- © 2022 Optica Publishing GroupDichroic absorption dye-doped liquid crystal switching is preferred for transmittance control with maintaining visual clarity. In this paper, we present a parametric analysis of chiral guest-host liquid crystal (C-GHLC) switching for an enhanced transmittance-tunable smart window. Further analysis of the chiral twist power resulted in the proposal of a new modified transmittance governing formula for C-GHLC. The optimal C-GHLC cell design was determined through a comprehensive examination of the electro-optic transmittance change between transparent and opaque states by optimizing the chiral twist power in terms of ‘d/p’. Along with the theoretical parametric design of the C-GHLC cell, an optimal condition for the C-GHLC cell which can use commercial display driving environments was experimentally demonstrated for the first time. Consequently, an improved transmittance control (∆T ≈ 40.5%) with a low voltage (Von ≈ 18 V) and with a sufficiently fast response time (τ ≈ 12 ms) suitable for 60 Hz (< 16.7 ms) was confirmed.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/112868
- DOI
- 10.1364/ome.459967
- ISSN
- 2159-3930
- Article Type
- Article
- Citation
- Optical Materials Express, vol. 12, no. 7, page. 2568 - 2583, 2022-07
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