Electrochromic Intelligent Visual Humidity Indication System
Mingshuo Zhen, Xiaoran LIU, Xiangqian Fan, Wenping Zhang, Dongdong YAN, Lei LIU, Chen LI · Journal of Inorganic Materials · 2024
In recent years, humidity sensors have attracted widespread attention from researchers in fields such as food safety and soil monitoring.Traditional humidity sensors exhibit the advantages of good stability and high sensitivity.However, most humidity sensing systems convert humidity signals into recogn izable waveforms through wired connections and large external devices, making it impossible to achieve real-time monitoring of changes in humidity information.The direct conversion of humidity information into visible color signals provides an ideal solution to the aforementioned problems.This study integrates humidity sensors and electrochromic devices (ECDs) to prepare an intelligent visual humidity monitoring system.By converting humidity signals into voltage signals to drive ECDs, stable and reversible color changes in the system can be achieved.The ECD is prepared using tungsten trioxide (WO3) as the negative electrode and zinc foil (Zn) as the positive electrode.Based on the output voltage of the humidity sensor, it achieves transitions between different working states, thereby generating color signals that