4.7 Article

A cholesteric liquid crystal smart window with a low operating voltage

期刊

DYES AND PIGMENTS
卷 197, 期 -, 页码 -

出版社

ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2021.109843

关键词

Liquid crystal; Smart window; Fingerprint; Dichroic dye; Energy saving

资金

  1. Kangwon National University
  2. National Research Foundation of Korea (NRF) - Korea government (MSIP) [NRF-2020R1A2C1006464, NRF-2021R1I1A3052581]

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A dye-doped cholesteric liquid crystal smart window with a haze-free opaque state is demonstrated. The window utilizes a random stripe pattern called the fingerprint (FP) texture as its initial state, which has a slightly higher transmittance than the twisted state but much lower than the homogeneously aligned state. Additionally, the proposed LC cell shows the lowest operating voltage among guest-host liquid crystal cells due to vertical anchoring at the surfaces.
A dye-doped cholesteric liquid crystal smart window with a haze-free opaque state is demonstrated. We designed a random stripe pattern in the cholesteric phase, known as the fingerprint (FP) texture, as an initial state (opaque state). In the theoretical calculation of the LC alignment states, although the transmittance of the FP state is slightly higher than that of the twisted state (planar state), it is much lower than homogeneously aligned states. Moreover, we confirmed the proposed LC cell shows the lowest operating voltage (4 V) among guest-host liquid crystal cells because of vertical anchoring at the surfaces.

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