Ionic Chiral Ferrocene Doped Cholesteric Liquid Crystal with Electronically Tunable Reflective Bandwidth performance

He, Wanli; Zhang, Yaqian; Hu, Wen-Tuo; Zhou, Huimin; Yang, Zhou; Cao, Hui; Wang, Dong

doi:10.3390/ma15248749

Cited by 3 publications

(1 citation statement)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Compared with traditional windows, smart windows enable dynamic regulation of daylighting, which is conducive to thermal management, energy consumption reduction, and color adjustment for humans [ 12 , 13 , 14 , 15 , 16 , 17 ]. According to Bragg’s law, CLCs in the planar orientation produce tunable selective reflection of incident light, covering the near-infrared band, whose energy accounts for most of the solar infrared radiation [ 18 , 19 , 20 , 21 ]. In addition, external stimuli are able to manipulate the color change of CLCs’ Bragg reflection, meeting the demands of decoration and antiglare [ 22 ].…”

Section: Introductionmentioning

confidence: 99%

Temperature Self-Adaptive and Color-Adjustable Smart Window Based on Templated Cholesteric Liquid Crystals

Sun,

2023

Polymers

View full text Add to dashboard Cite

Cholesteric liquid crystals (CLCs) exhibit selective reflection due to their self-assembled helical superstructures. Reconfigurable templates can achieve integration functions via inducing processes of molecular assemblies. Here we demonstrate temperature self-adaptive and color-adjustable smart windows using CLCs, which are fabricated via the templating method and exhibit simultaneous reflections in the visible and infrared spectra. Reflection bands formed by the refilled CLC materials can be adjusted reversibly both upon thermal and electrical actuation. In CLC with adjustable reflection in the infrared, the central wavelength of the infrared reflection band can be adjusted from 950 nm to 1305 nm via temperature, and from 1150 nm to 950 nm via electric field. A temperature variation of 10.3 °C within 55 s was induced by the single-layer templated CLC cell, and a comfortable temperature range could be effectively maintained by the CLC cell in a varied environment. In CLC with dynamic color in the visible spectrum, color shifts from 530 nm to 650 nm tuned by temperature and from 530 nm to 440 nm adjusted by electric field were obtained. Temperature-responsive reflection in the infrared spectrum contributes to automatic thermal management, and electric-field-induced band shift in the visible spectrum enables active dynamic color adjustment. The presented templated CLC smart windows show considerable potential in energy conservation and biological clock regulation fields.

show abstract