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Molecular Crystals and Liquid Crystals Volume 736, 2022 - Issue 1
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LOW-DIMENSIONAL SOLIDS AND MOLECULAR CRYSTALS

Tuning of polymer-wall surface components and its effect on the optoelectronic performance of liquid crystal devices with polymer walls

Xiang Xiaa National Engineering Laboratory of Special Display Technology, State Key Laboratory of Advanced Display Technology, Special Display and Imaging Technology Innovation Center of Anhui Province, Academy of Opto-Electronic Technology, Hefei University of Technology, Hefei, China;b Anhui Province Key Laboratory of Advanced Functional Materials and Devices, School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei, ChinaView further author information
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Yuge Lianga National Engineering Laboratory of Special Display Technology, State Key Laboratory of Advanced Display Technology, Special Display and Imaging Technology Innovation Center of Anhui Province, Academy of Opto-Electronic Technology, Hefei University of Technology, Hefei, China;b Anhui Province Key Laboratory of Advanced Functional Materials and Devices, School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei, ChinaView further author information
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Xuelian Liua National Engineering Laboratory of Special Display Technology, State Key Laboratory of Advanced Display Technology, Special Display and Imaging Technology Innovation Center of Anhui Province, Academy of Opto-Electronic Technology, Hefei University of Technology, Hefei, China;b Anhui Province Key Laboratory of Advanced Functional Materials and Devices, School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei, ChinaView further author information
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Le Yanga National Engineering Laboratory of Special Display Technology, State Key Laboratory of Advanced Display Technology, Special Display and Imaging Technology Innovation Center of Anhui Province, Academy of Opto-Electronic Technology, Hefei University of Technology, Hefei, China;c School of Electronic Science and Applied Physics, Hefei University of Technology, Hefei, ChinaView further author information
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Jun Zhua National Engineering Laboratory of Special Display Technology, State Key Laboratory of Advanced Display Technology, Special Display and Imaging Technology Innovation Center of Anhui Province, Academy of Opto-Electronic Technology, Hefei University of Technology, Hefei, ChinaORCID Iconhttps://orcid.org/0000-0003-1938-4705View further author information
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Miao Xua National Engineering Laboratory of Special Display Technology, State Key Laboratory of Advanced Display Technology, Special Display and Imaging Technology Innovation Center of Anhui Province, Academy of Opto-Electronic Technology, Hefei University of Technology, Hefei, ChinaORCID Iconhttps://orcid.org/0000-0003-3610-0735View further author information
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Guobing Zhanga National Engineering Laboratory of Special Display Technology, State Key Laboratory of Advanced Display Technology, Special Display and Imaging Technology Innovation Center of Anhui Province, Academy of Opto-Electronic Technology, Hefei University of Technology, Hefei, China;b Anhui Province Key Laboratory of Advanced Functional Materials and Devices, School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei, ChinaView further author information
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Longzhen Qiua National Engineering Laboratory of Special Display Technology, State Key Laboratory of Advanced Display Technology, Special Display and Imaging Technology Innovation Center of Anhui Province, Academy of Opto-Electronic Technology, Hefei University of Technology, Hefei, China;b Anhui Province Key Laboratory of Advanced Functional Materials and Devices, School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei, ChinaORCID Iconhttps://orcid.org/0000-0002-8356-6303View further author information
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Hongbo Lua National Engineering Laboratory of Special Display Technology, State Key Laboratory of Advanced Display Technology, Special Display and Imaging Technology Innovation Center of Anhui Province, Academy of Opto-Electronic Technology, Hefei University of Technology, Hefei, China;b Anhui Province Key Laboratory of Advanced Functional Materials and Devices, School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei, China;d Key Laboratory of Optical Calibration and Characterization, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei, ChinaCorrespondence[email protected]
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Pages 93-102 | Published online: 23 Jun 2022
 
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Abstract

In this study, surface initiation was used to form dense and flat films in liquid crystal media. As a result, low-surface-energy components are thermodynamically forced to segregate on the liquid crystal-polymer interface already during the polymerization process. This finding is confirmed by ATR and XPS. In addition, more low-surface-energy components accumulate on the wall surface of the polymer upon decreasing the UV light intensity during polymerization. These components reduce both the anchoring energy of the polymer wall as well as the threshold voltage of any liquid crystal device that uses this polymer wall.

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was financially supported by the National Key Research and Development Program of China (2019YFE0101300).

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