Optically Rewritable Transparent Liquid Crystal Displays Enabled by Light-Driven Chiral Fluorescent Molecular Switches
Optically Rewritable Transparent Liquid Crystal Displays Enabled by Light-Driven Chiral Fluorescent Molecular Switches
复制标题
由光驱动手性荧光分子开关实现的光学可重写透明液晶显示器
DOI：
10.1002/adma.201807751
复制
发表时间：
2019-03-08
影响因子：
29.4
通讯作者：
Li, Quan
中科院分区：
文献类型：
--
作者：
Li, Juntao;Bisoyi, Hari Krishna;Li, Quan
响应于特定刺激而表现出不同功能的功能性软材料对于制造具有优异动态性能的先进设备来说是非常理想的。上级动态性能。本文设计并合成了两种新型的光驱动手性荧光分子开关，它们能够在各向同性和各向异性介质中表现出前所未有的可逆Z/E光异构化行为，同时沿着荧光强度可调。使用这些新的荧光分子开关作为手性掺杂剂制造的胆甾型液晶表现出跨越光谱的可见光和红外区域的可逆反射颜色调谐。已经使用低手性和高手性双折射膜制造了透明显示器件，所述双折射膜分别仅在荧光模式下或在荧光和反射模式下操作。采用短间距双模式显示膜的双模式显示装置能够在包括日光和黑暗的所有环境光条件下按需工作，具有快速响应和高分辨率。此外，本文公开了使用包含易于制造和操作的光驱动手性荧光分子开关之一的石墨烯膜的“远程书写板”的概念验证。这种由光驱动的手性荧光分子开关实现的光学透明显示装置为开发在不同照明条件下的新型显示技术铺平了新的道路。
Functional soft materials exhibiting distinct functionalities in response to a specific stimulus are highly desirable towards the fabrication of advanced devices with superior dynamic performances. Herein, two novel light-driven chiral fluorescent molecular switches have been designed and synthesized that are able to exhibit unprecedented reversible Z/E photoisomerization behavior along with tunable fluorescence intensity in both isotropic and anisotropic media. Cholesteric liquid crystals fabricated using these new fluorescent molecular switches as chiral dopants exhibit reversible reflection color tuning spanning the visible and infrared region of the spectrum. Transparent display devices have been fabricated using both low chirality and high chirality cholesteric films that operate either exclusively in fluorescent mode or in both fluorescent and reflection mode, respectively. The dual mode display device employing short pitch cholesteric film is able to function on demand under all ambient light conditions including daylight and darkness with fast response and high resolution. Moreover, the proof-of-concept for a "remote-writing board" using cholesteric films containing one of the light-driven chiral fluorescent molecular switches with ease of fabrication and operation is disclosed herein. Such optically rewritable transparent display devices enabled by light-driven chiral fluorescent molecular switches pave a new way for developing novel display technology under different lighting conditions.