题名：Low-Voltage Electrically Responsive Photonic Crystal Based on Weak-Polar Colloidal System

来源：Advanced Materials

发表年代：2022

作者：Guangyang Bao, Wenyuan Yu, Qianqian Fu, Jianping Ge*

Abstract：Electrically responsive photonic crystal (ERPC) based on particle electro phoresis is a promising material to construct reflective color displays with low-power-consumption and antiglare advantages. However, the high driving voltages for the polar ERPC inevitably cause electrochemical reactions on the electrode, which decreases the stability and reversibility of electrical response. Here, a weak-polar EPRC composed of hydrophobic SiO₂ particles, 1,2-dichlorobenzene (DCB), and dioctyl sulfosuccinate sodium salt (AOT) is fabricated based on the charge separation by AOT reverse micelles and for mation of highly charged particles in DCB. Compared to the polar ERPCs, the SiO₂/DCB-AOT ERPC works at much lower voltages (0.5–1.7 V) and still possesses a wide color tuning range because the weak-polar solvent applies less screening to the coulombic interactions. The low potential further renders the ERPC good capability against color fading in a strong field and long-term reversibility during color switching, which addresses the critical concerns for its application in reflective displays.

Low-Voltage Electrically Responsive Photonic Crystal Based on Weak-Polar Colloidal System.pdf