Large area smart device can be prepared using tungsten trioxide film as an electrochromic layer material. While there are uneven discoloration problem in the production of these large-area electrochromic devices. How to solve the problem of uneven discoloration of large-area electrochromic devices? Experts propose the following options:
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1.0 Reduce the resistance of the transparent conductive electrode. The lower the resistance of the transparent conductive electrode, the lower the voltage drop across the ITO portion, and the electrode potential distribution inside the entire plane is more uniform.
2.0 Reduce the polarization voltage through the current limiting module. For example, a custom resistor in series with the electrochromic device is used as a current limiting module to ensure that the operating current of the overall device is low during the operation of the electrochromic device. So, if the voltage drop in the transparent conductive electrode portion is lower, color unevenness will be significantly reduced.
