Self-alignment technique of liquid crystal using a novel additive containing thiol group
| Autor: | Vitaly P. Panov, Heui-Seok Jin, Hyun-Jin Yoon, Jang-Kun Song, Doyeon Lee |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Fabrication 02 engineering and technology engineering.material 010402 general chemistry 01 natural sciences Thiol group law.invention Adsorption Coating Liquid crystal law Self alignment Materials Chemistry Physical and Theoretical Chemistry Spectroscopy Liquid-crystal display business.industry 021001 nanoscience & nanotechnology Condensed Matter Physics Atomic and Molecular Physics and Optics 0104 chemical sciences Electronic Optical and Magnetic Materials engineering Optoelectronics 0210 nano-technology business Layer (electronics) |
| Zdroj: | Journal of Molecular Liquids. 322:114557 |
| ISSN: | 0167-7322 |
| DOI: | 10.1016/j.molliq.2020.114557 |
| Popis: | Self-aligned vertical alignment (SA-VA) technique in liquid crystal display (LCD), in which the alignment layer coating process is not necessary, has attracted significant attention owing to its cost-effectiveness and usefulness in the control of LC alignment and the fabrication of LCDs. However, it presents a critical drawback pertaining to the occurrence of LC alignment defects caused by non-uniform additive attachment on the surface; as a result, the technology has not yet been adopted for commercial applications. Here, we propose an advanced SA-VA technology using novel additives containing thiol groups and thermally induced physicochemical adsorption of additives on the surface. Using the new materials as well as method, we successfully demonstrate a perfect vertical alignment of LC without non-uniform alignment defects. In addition, it is confirmed that the electro-optical performance of the cell is comparable to that of a conventional commercial device. Thus, our method can overcome the limitation of existing SA-VA technology, and may be applied to commercial SA-VA mode displays. Further, with its self-alignment feature, the technology may be useful for the future display applications such as cost-effective smart window using LC. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect