| The introduction of Electrochromic Device
- How it works:
Electrochromic Devices are multi-layer structures that can stably and reversibly change color when a driving voltage is applied. This is thanks to the electrochemical properties of the materials used. When a voltage is applied, lithium ions are transferred from one layer to another one, resulting in the modification of the material′s crystal structure. This transformation allows to adjust the visible light transmission of the device.
- What is the composition of EC device?
The device′s structure consists of:
- Transparent Conductor Layer
- Ion Storage Layer
- Ion Conductor Layer (or Electrolyte)
- Electrochromic Layer
- What are the advantages of electrochromic materials?
The tinting mechanism of Electrochromic Devices is caused by an electrochemical reaction. We get this reaction by applying and precisely controlling a driving voltage and current that make the device bleach or darken between transparent and tinted state (gray scale) when desired. The device only need a low driving voltage and low current for this process to take place. Furthermore, once the desired shade is obtained, the optical memory of the electrochromic device allows to maintain that color without supplying power.