Secondary electro-optic response induced by VOD875S dye in polymer stabilised liquid crystals

Huai, He; Mu, Qihui; Li, Xiaoshuai; Ma, Hongmei; Sun, Yubao

doi:10.1080/02678292.2019.1706770

Cited by 1 publication

(2 citation statements)

References 20 publications

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“…The contrast ratio (CR) is equivalent to T max / T min . The response times, including rising time (driven by V sat ) and decaying time (removing V sat ), are calculated from time-dependent transmittance curves. ,, …”

Section: Methodsmentioning

confidence: 99%

“…The latter, however, contains 90% or more LC content, and LC molecules are stabilized in the polymer network. The PSLC exhibits a loose network morphology with nodes or fibril strands of LC arranged into bundles in the polymer network. − Generally, electrically induced switching from scattering to a transparent state could be realized in the PSLC films by spatially manipulating the array of LC fibrils from random to aligned arrangements. An electric field of sufficient strength allows the LC orientation and enables to yield the precise matching of the ordinary refractive indices of LC ( n o ) and polymer matrix ( n p ).…”

Section: Introductionmentioning

confidence: 99%

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Reverse Mode Polymer-Stabilized Liquid Crystal Films via Thiol and Acrylic Azobenzene

Yun

Saeed

Kim

et al. 2023

ACS Appl. Polym. Mater.

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Reverse mode polymer-stabilized liquid crystal (RPSLC) have shown significant promise in energy-saving smart windows. However, to make them practical for widespread use, it is crucial to reduce the operating voltage and enhance the contrast ratio. Here, we introduce an approach to achieving these goals by using acrylic azobenzene, which serves as both a polymerizable monomer and dopant in RPSLC films fabricated using photopolymerization. The results showed that the polymer morphologies could be manipulated by varying the contents of liquid crystal and azobenzene, leading to significant improvements in the electro-optical (EO) properties of the RPSLC films. Particularly, great improvements in EO properties were realized by doping a 0.3 wt % azobenzene monomer, the threshold voltage was lowered from 18.2 to 11.5 V, and the contrast ratio was raised from 115.6 to 185.9. This work provides mechanistic insight to regulate the microstructure and optimize the EO properties of RPSLC films.

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Section: Methodsmentioning

confidence: 99%