Zhang Yang, Wang Changrui, Zhao Wei, Li Ming, Wang Xiao, Yang Xiulan, Hu Xiaowen, Yuan Dong, Yang Weiping, Zhang Yi, Lv Pengrong, He Jialin, Zhou Guofu
Solar Energy Research Institute, Yunnan Normal University, Kunming 650500, China.
SCNU-TUE Joint Lab of Device Integrated Responsive Materials (DIRM), National Center for International Research on Green Optoelectronics, South China Normal University, No. 378, West Waihuan Road, Guangzhou Higher Education Mega Center, Guangzhou 510006, China.
Polymers (Basel). 2019 Nov 13;11(11):1869. doi: 10.3390/polym11111869.
Polymer stabilized liquid crystal (PSLC) devices can be used as smart privacy windows that switch between transparent and opaque states. The polyimide alignment layer of a PSLC device is usually obtained by the treatment of polyamide acid (PAA) with temperatures over 200 °C. This hinders the fabrication of PSLC devices on flexible substrates, which melt at these high temperatures. In this work, the fabrication of a PSLC alignment layer using a lower temperature that is compatible with most flexible substrates, is demonstrated. It was found that the treatment of PAA at 150 °C could generate the same alignment for liquid crystals. Based on this, a PSLC device was successfully fabricated on a flexible polyethylene terephthalate (PET) substrate, demonstrating excellent electro-optic performances.
聚合物稳定液晶（PSLC）器件可用作能在透明和不透明状态之间切换的智能隐私窗。PSLC器件的聚酰亚胺取向层通常通过在200℃以上的温度下处理聚酰胺酸（PAA）来获得。这阻碍了在这些高温下会熔化的柔性基板上制造PSLC器件。在这项工作中，展示了使用与大多数柔性基板兼容的较低温度来制造PSLC取向层。发现将PAA在150℃下处理可为液晶产生相同的取向。基于此，在柔性聚对苯二甲酸乙二酯（PET）基板上成功制造了一个PSLC器件，展示出优异的电光性能。
