Jiacheng Hu, Qingjiao Huang, Wenshuai Feng, Yongfeng Wang, Menghan Yin, Peipei Shao, Bowen Li, Ying Zhu, Rui-Tao Wen
Journal of Optical Microsystems, Vol. 4, Issue 03, 031205, (June 2024) https://doi.org/10.1117/1.JOM.4.3.031205
TOPICS: Reflectors, Reflectivity, Refractive index, Color, Reflection, Copper, Absorption, Electrodes, Solid state electronics, Modulation
The dynamic color control of solid-state electrochromic (EC) devices has sparked broad interest in both academia and industry. In this work, we report a combination of an optical stack of a Bragg reflector and Fabry–Pérot cavity into a solid-state EC device that achieves high brightness and saturation. The Bragg reflector and Fabry–Pérot optical stacks are designed as multi-color selectors through dynamically varying the optical constants (n and k) of the EC layer, allowing selective reflection of different wavelengths. By employing EC-inactive mixed-tungsten-vanadium oxide as the counter electrode, high reflectivity and contrast can be ensured. The demonstrated combination of the Bragg reflector and Fabry–Pérot cavity into a solid-state EC device offers a practical approach to designing and fabricating high-performance reflective EC devices.