Affiliation:
1. Department of Polymer‐Nano Science and Technology Department of Nano Convergence Engineering Jeonbuk National University Jeonju 54896 Republic of Korea
2. Department of Materials Science and Engineering Gwangju Institute of Science and Technology Gwangju 61005 Republic of Korea
3. Department of Flexible and Printable Electronics and LANL‐JBNU Engineering Institute‐Korea Jeonbuk National University Jeonju 54896 Republic of Korea
Abstract
AbstractViologen‐based reactive mesogen (VRM) is newly designed and synthesized for the development of polarization‐dependent, color‐tunable, and transparent electrochromic (EC) smart windows. By controlling electric field, the color of VRM can be intentionally tuned due to the formation of dication (D state), cation‐radical (C state), and neutral state (N state). Based on the deep understanding of phase transition of VRM, a uniaxially oriented VRM hierarchical nanostructure is successfully constructed on the macroscopic area by simple coating and self‐assembly processes. The subsequent photopolymerization significantly improves thermal, mechanical, and chemical stabilities of the VRM thin film. In addition to the control of color, the transmittance of uniaxially oriented VRM‐based EC smart window can be precisely tuned by rotating a linear polarizer.