The Electro-optical study of Al<sub>2</sub>O<sub>3</sub> nanoparticles doped polymer dispersed liquid crystal films

Jia, Miaomiao; Zhao, Yuzhen; Gao, Hong; Wang, Dong; Miao, Zongcheng; Cao, Hui; Yang, Zhou; He, Wanli

doi:10.1080/02678292.2021.1943024

Cited by 8 publications

(3 citation statements)

References 34 publications

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“…This can be a ributed to the fact that the anchoring force of the polymer network to the LC molecules decreased with the growth of the LC microdroplet size. When the applied voltage was removed, the pointing vectors of the LC molecules did not easily return to their initial state, leading to an increase in the toff [54]. Figure 4 presents the effect of different LC contents on the electro-optical properties of PDLC films.…”

Section: The Effect Of Lc Content On Electro-optical Properties Of Pdlcmentioning

confidence: 99%

Preparation and Application of Polymer-Dispersed Liquid Crystal Film with Step-Driven Display Capability

Lin,

Zhao,

Jiao

et al. 2024

Molecules

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The realization of multifunctional advanced displays with better electro-optical properties is especially crucial at present. However, conventional integral full drive-based transparent display is increasingly failing to meet the demands of the day. Herein, partitioned polymerization as a novel preparation method was introduced innovatively into polymer-dispersed liquid crystals (PDLC) for realizing a step-driven display in agreement with fluorescent dye to solve the above drawback. At first, the utilization of fluorescent dye to endow the PDLC film with fluorescent properties resulted in a reduction in the saturation voltage of the PDLC from 39.7 V to 25.5 V and an increase in the contrast ratio from 58.4 to 96.6. Meanwhile, the experimental observations and theoretical considerations have elucidated that variation in microscopic pore size can significantly influence the electro-optical behavior of PDLC. Then, the step-driven PDLC film was fabricated through the exposure of different regions of the LC cell to different UV-light intensities, resulting in stepwise voltage–transmittance (V–T) responses of the PDLC film for the corresponding regions. Consequently, under appropriate driving voltages, the PDLC can realize three different states of total scattering, semi-transparent and total transparent, respectively. In addition, the PDLC film also embodied an outstanding anti-aging property and UV-shielding performance, which makes it fascinating for multifunctional advanced display applications.

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Section: The Effect Of Lc Content On Electro-optical Properties Of Pdlcmentioning

confidence: 99%

Preparation and Application of Polymer-Dispersed Liquid Crystal Film with Step-Driven Display Capability

Lin,

Zhao,

Jiao

et al. 2024

Molecules

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“…10 However, they also exhibit drawbacks, including high operational voltages ranging from 60 to 150 V, reduced light transmission, and off-axis haze. 11,12 To enhance their electro-optical characteristics, various nanoparticles have been incorporated into PDLC films through doping, including quantum dots, 13,14 graphene-like carbon materials, 15,16 magnetic nanoparticles, 17,18 oxide nanoparticles, 11,19–21 and other functional nanoparticles. 22–24…”

Section: Introductionmentioning

confidence: 99%

The effect of high dielectric BaTiO₃ nanoparticle dimensions on the dielectric properties and electro-optical performance of polymer dispersed liquid crystal films

Wu,

Sun,

Wang

et al. 2024

J. Mater. Chem. C

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“…В настоящее время многие исследования КПЖК материалов сосредоточены на улучшении электрооптических характеристик КПЖК-пленок (управляющих напряжений, коэффициента пропускания, контрастного отношения). Так, например допирование ЖК дихроичным красителем позволяет увеличить контрастное отношение [9], добавление в ЖК наночастиц или использование модифицированной полимерной матрицы позволяет снизить управляющие напряжения [10,11]. Задание конических граничных условий в каплях нематика позволяет одновременно уменьшить управляющие напряжения, достичь больших коэффициентов пропускания во включенном состоянии и значительного контрастного отношения CR [12,13].…”

Section: Introductionunclassified

Electrically Induced Optical and Structural Response of Cholesteric and Nematic Droplets with Conical Boundary Conditions

Feizer¹,

Krakhalev²,

Zyryanov³

2022

Liq. Cryst. and their Appl.

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The electro-optical response of polymer dispersed liquid crystals films has been studied. The polymer specifies the conical boundary conditions for the cholesteric and nematic LC. It is shown that for the cholesteric-based film with the relative chiral parameters of droplets equal to 0.32, control voltages are less than control voltages for the nematic-based film. The threshold voltages are 2.7 V and 4.9 V, and the saturation voltages are 7.3 V and 9.0 V for the cholesteric-based and nematic-based films, respectively. At saturation voltage, the light transmission of these films is over 80 %. The cholesteric-based film turns into a strong scattering state during 85 ms after switching off voltage, while the nematic-based film turns into initial scattering state during a few days. Significant differences in the electro-optical response of the studied films were explained using an examination of electrically induced transformations of the orientational structures formed in nematic and cholesteric droplets. Polymer dispersed cholesteric liquid crystals with conical boundary conditions are prospectful for the development of devices with low-voltage control.

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The Electro-optical study of Al₂O₃ nanoparticles doped polymer dispersed liquid crystal films

Cited by 8 publications

References 34 publications

Preparation and Application of Polymer-Dispersed Liquid Crystal Film with Step-Driven Display Capability

Preparation and Application of Polymer-Dispersed Liquid Crystal Film with Step-Driven Display Capability

The effect of high dielectric BaTiO₃ nanoparticle dimensions on the dielectric properties and electro-optical performance of polymer dispersed liquid crystal films

Electrically Induced Optical and Structural Response of Cholesteric and Nematic Droplets with Conical Boundary Conditions

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The Electro-optical study of Al2O3 nanoparticles doped polymer dispersed liquid crystal films

Cited by 8 publications

References 34 publications

Preparation and Application of Polymer-Dispersed Liquid Crystal Film with Step-Driven Display Capability

Preparation and Application of Polymer-Dispersed Liquid Crystal Film with Step-Driven Display Capability

The effect of high dielectric BaTiO3 nanoparticle dimensions on the dielectric properties and electro-optical performance of polymer dispersed liquid crystal films

Electrically Induced Optical and Structural Response of Cholesteric and Nematic Droplets with Conical Boundary Conditions

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The Electro-optical study of Al₂O₃ nanoparticles doped polymer dispersed liquid crystal films

The effect of high dielectric BaTiO₃ nanoparticle dimensions on the dielectric properties and electro-optical performance of polymer dispersed liquid crystal films