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High-Contrast and Fast Photorheological Switching of a Twist-Bend Nematic Liquid Crystal
Published on: October 31, 2019
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Optically Rewritable Transparent Liquid Crystal Displays Enabled by Light-Driven Chiral Fluorescent Molecular
Juntao Li1, Hari Krishna Bisoyi2, Jiajun Tian1
1Key Laboratory of Carbon Fibers and Functional Polymers, Ministry of Education; College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China.
Advanced Materials (Deerfield Beach, Fla.)
|January 12, 2019
Summary
Novel light-driven chiral fluorescent molecular switches enable advanced transparent display devices. These materials offer tunable fluorescence and color changes, functioning in various light conditions for dynamic displays and writing boards.
Area of Science:
- Materials Science
- Organic Chemistry
- Optoelectronics
Background:
- Functional soft materials are crucial for advanced devices with dynamic capabilities.
- Stimulus-responsive materials are key to developing smart technologies.
- Molecular switches offer tunable properties for material applications.
Purpose of the Study:
- To design and synthesize novel light-driven chiral fluorescent molecular switches.
- To investigate their photoisomerization behavior and fluorescence properties.
- To fabricate and evaluate transparent display devices utilizing these switches.
Main Methods:
- Synthesis of two new light-driven chiral fluorescent molecular switches.
- Fabrication of cholesteric liquid crystals using these switches as chiral dopants.
- Construction and testing of transparent display devices in fluorescent and reflection modes.
Main Results:
- Achieved reversible Z/E photoisomerization and tunable fluorescence intensity.
- Demonstrated reversible reflection color tuning across visible and infrared spectra.
- Developed transparent display devices with dual fluorescent and reflection modes, including a "remote-writing board" prototype.
Conclusions:
- Light-driven chiral fluorescent molecular switches are effective for advanced display technologies.
- The developed switches enable optically rewritable transparent displays with dual-mode operation.
- These materials offer a new pathway for display technology adaptable to diverse lighting conditions.
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