Difluorovinyl Liquid Crystal Diluters Improve the Electro-Optical Properties of High-∆<i>n</i> Liquid Crystal Mixture for AR Displays
A liquid crystal (LC) mixture in liquid crystal on silicon (LCoS) is the core material for augmented reality (AR) displays. However, a LC mixture with high birefringence (Δ<i>n</i>) and large dielectric anisotropy (Δ<i>ε</i>) possesses high viscosity (<i>γ</i><...
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| Format: | Article |
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MDPI AG
2023-03-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/28/6/2458 |
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| author | Jiaxing Tang Zihao Mao Zhongwei An Ran Chen Xinbing Chen Pei Chen |
| author_facet | Jiaxing Tang Zihao Mao Zhongwei An Ran Chen Xinbing Chen Pei Chen |
| author_sort | Jiaxing Tang |
| collection | DOAJ |
| description | A liquid crystal (LC) mixture in liquid crystal on silicon (LCoS) is the core material for augmented reality (AR) displays. However, a LC mixture with high birefringence (Δ<i>n</i>) and large dielectric anisotropy (Δ<i>ε</i>) possesses high viscosity (<i>γ</i><sub>1</sub>), which results in a slow response time of LCoS devices for AR displays. This work proposes to apply difluorovinyl-based LC diluters to fine balance the low viscosity, high ∆<i>n</i>, and large ∆<i>ε</i> of the LC mixture for a fast response time. Through studying their effects on the key electro-optical properties of a high-∆<i>n</i> LC mixture, it is found that doping these diluter molecules to a high-∆<i>n</i> LC mixture can decrease the viscoelastic coefficient (<i>γ</i><sub>1</sub>/<i>K</i><sub>11</sub>), increase ∆<i>ε</i> and the figure of merit, maintain a wide nematic phase temperature range, a high clearing point, and ∆<i>n</i>. It also means that these diluters could effectively regulate the relationship between ∆<i>n</i>, ∆<i>ε</i>, and <i>γ</i><sub>1</sub> in the LC mixtures to achieve a fine balance of various excellent properties and further improve the LC device’s response time. The widespread applications of these liquid crystal diluters in emerging liquid crystal optical devices are foreseeable. |
| first_indexed | 2024-03-11T06:08:40Z |
| format | Article |
| id | doaj.art-c4adb4f729844b2c835f940ed77dd388 |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-11T06:08:40Z |
| publishDate | 2023-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-c4adb4f729844b2c835f940ed77dd3882023-11-17T12:50:37ZengMDPI AGMolecules1420-30492023-03-01286245810.3390/molecules28062458Difluorovinyl Liquid Crystal Diluters Improve the Electro-Optical Properties of High-∆<i>n</i> Liquid Crystal Mixture for AR DisplaysJiaxing Tang0Zihao Mao1Zhongwei An2Ran Chen3Xinbing Chen4Pei Chen5International Joint Research Center of Shaanxi Province for Photoelectric Materials Science, Key Laboratory of Applied Surface and Colloid Chemistry (MOE), Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Laboratory for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi’an 710119, ChinaInternational Joint Research Center of Shaanxi Province for Photoelectric Materials Science, Key Laboratory of Applied Surface and Colloid Chemistry (MOE), Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Laboratory for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi’an 710119, ChinaInternational Joint Research Center of Shaanxi Province for Photoelectric Materials Science, Key Laboratory of Applied Surface and Colloid Chemistry (MOE), Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Laboratory for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi’an 710119, ChinaInternational Joint Research Center of Shaanxi Province for Photoelectric Materials Science, Key Laboratory of Applied Surface and Colloid Chemistry (MOE), Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Laboratory for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi’an 710119, ChinaInternational Joint Research Center of Shaanxi Province for Photoelectric Materials Science, Key Laboratory of Applied Surface and Colloid Chemistry (MOE), Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Laboratory for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi’an 710119, ChinaInternational Joint Research Center of Shaanxi Province for Photoelectric Materials Science, Key Laboratory of Applied Surface and Colloid Chemistry (MOE), Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Laboratory for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi’an 710119, ChinaA liquid crystal (LC) mixture in liquid crystal on silicon (LCoS) is the core material for augmented reality (AR) displays. However, a LC mixture with high birefringence (Δ<i>n</i>) and large dielectric anisotropy (Δ<i>ε</i>) possesses high viscosity (<i>γ</i><sub>1</sub>), which results in a slow response time of LCoS devices for AR displays. This work proposes to apply difluorovinyl-based LC diluters to fine balance the low viscosity, high ∆<i>n</i>, and large ∆<i>ε</i> of the LC mixture for a fast response time. Through studying their effects on the key electro-optical properties of a high-∆<i>n</i> LC mixture, it is found that doping these diluter molecules to a high-∆<i>n</i> LC mixture can decrease the viscoelastic coefficient (<i>γ</i><sub>1</sub>/<i>K</i><sub>11</sub>), increase ∆<i>ε</i> and the figure of merit, maintain a wide nematic phase temperature range, a high clearing point, and ∆<i>n</i>. It also means that these diluters could effectively regulate the relationship between ∆<i>n</i>, ∆<i>ε</i>, and <i>γ</i><sub>1</sub> in the LC mixtures to achieve a fine balance of various excellent properties and further improve the LC device’s response time. The widespread applications of these liquid crystal diluters in emerging liquid crystal optical devices are foreseeable.https://www.mdpi.com/1420-3049/28/6/2458high birefringence liquid crystaldiluter moleculeAR displayslarge dielectric anisotropylow viscosity |
| spellingShingle | Jiaxing Tang Zihao Mao Zhongwei An Ran Chen Xinbing Chen Pei Chen Difluorovinyl Liquid Crystal Diluters Improve the Electro-Optical Properties of High-∆<i>n</i> Liquid Crystal Mixture for AR Displays Molecules high birefringence liquid crystal diluter molecule AR displays large dielectric anisotropy low viscosity |
| title | Difluorovinyl Liquid Crystal Diluters Improve the Electro-Optical Properties of High-∆<i>n</i> Liquid Crystal Mixture for AR Displays |
| title_full | Difluorovinyl Liquid Crystal Diluters Improve the Electro-Optical Properties of High-∆<i>n</i> Liquid Crystal Mixture for AR Displays |
| title_fullStr | Difluorovinyl Liquid Crystal Diluters Improve the Electro-Optical Properties of High-∆<i>n</i> Liquid Crystal Mixture for AR Displays |
| title_full_unstemmed | Difluorovinyl Liquid Crystal Diluters Improve the Electro-Optical Properties of High-∆<i>n</i> Liquid Crystal Mixture for AR Displays |
| title_short | Difluorovinyl Liquid Crystal Diluters Improve the Electro-Optical Properties of High-∆<i>n</i> Liquid Crystal Mixture for AR Displays |
| title_sort | difluorovinyl liquid crystal diluters improve the electro optical properties of high ∆ i n i liquid crystal mixture for ar displays |
| topic | high birefringence liquid crystal diluter molecule AR displays large dielectric anisotropy low viscosity |
| url | https://www.mdpi.com/1420-3049/28/6/2458 |
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