Highly Stable, Pretilted Homeotropic Alignment of Liquid Crystals Enabled by In Situ Self-Assembled, Dual-Wavelength Photoalignment

Kumar, Vineet1; Ye, Zhiqiu1; Jiang, Haodong1,3; Shi, Yue1,4; Li, Ke1,5,6; Gerard, Davy5,6; Luo, Dan1; Mu, Quanquan2; Liu, Yan Jun1,2

2020-07-28

10.1021/acsaelm.0c00295

ACS Applied Electronic Materials   影响因子和分区

2637-6113

Homeotropic alignment of liquid crystals (LCs) is one of the key modes used in commercial liquid crystal displays (LCDs) due to its advantages, such as high contrast ratios and fast response speed. Here, we report stable homeotropic LC alignment with a small pretilt angle in a nematic, negative LC host doped with additives including self-aligning agents, photoresponsive azo dyes, and reactive mesogen via an in situ self-assembled, dual-wavelength photoalignment approach. The underlying mechanism of stable, pretilted homeotropic LC alignment was further analyzed in detail. The achieved pretilted homeotropic LC cells are very stable against heat and UV light exposure and demonstrate excellent electro-optical characteristics. The experimental results show that such a noncontact, simple homeotropic alignment technique has big potential in many applications, such as high-quality LCDs, spatial light modulators, and other optoelectronic devices.

liquid crystals vertical alignment self-assembly azo dyes photoalignment polymer stabilization

ESCI ; EI

英语

第一 ; 通讯

Natural Science Foundation of Guangdong Province[2017A030313034][2018A030310224] ; Shenzhen Science and Technology Innovation Commission[JCYJ20170817111349280][JCYJ20180305180635082][GJHZ20180928155207206] ; Open Fund of State Key Laboratory of Applied Optics[SKLAO-201904] ; Guangdong Innovative and Entrepreneurial Research Team Program[2017ZT07C071]

Engineering ; Materials Science

Engineering, Electrical & Electronic ; Materials Science, Multidisciplinary

WOS:000557756300026

AMER CHEMICAL SOC

20211110091962

Additives ; Azo dyes ; Light modulators ; Liquid crystal displays ; Liquid crystals ; Optoelectronic devices

Mechanical Devices:601.1 ; Optical Devices and Systems:741.3 ; Chemical Agents and Basic Industrial Chemicals:803

Web of Science

1.Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen 518055, Peoples R China
2.Chinese Acad Sci, Changchun Inst Opt Fine Mech & Phys, State Key Lab Appl Opt, Changchun 130033, Peoples R China
3.Harbin Inst Technol, Harbin 150001, Peoples R China
4.Ningbo Univ, Sch Phys Sci & Technol, Ningbo 315211, Peoples R China
5.Univ Technol Troyes, Light Nanomat & Nanotechnol L2n, F-10004 Troyes, France
6.CNRS ERL 7004, F-10004 Troyes, France

Kumar, Vineet,Ye, Zhiqiu,Jiang, Haodong,et al. Highly Stable, Pretilted Homeotropic Alignment of Liquid Crystals Enabled by In Situ Self-Assembled, Dual-Wavelength Photoalignment[J]. ACS Applied Electronic Materials,2020,2(7):2017-2025.

Kumar, Vineet.,Ye, Zhiqiu.,Jiang, Haodong.,Shi, Yue.,Li, Ke.,...&Liu, Yan Jun.(2020).Highly Stable, Pretilted Homeotropic Alignment of Liquid Crystals Enabled by In Situ Self-Assembled, Dual-Wavelength Photoalignment.ACS Applied Electronic Materials,2(7),2017-2025.

Kumar, Vineet,et al."Highly Stable, Pretilted Homeotropic Alignment of Liquid Crystals Enabled by In Situ Self-Assembled, Dual-Wavelength Photoalignment".ACS Applied Electronic Materials 2.7(2020):2017-2025.