ECD performances

In this chapter, we present the best results obtained with these different materials in order to give an ECD system. Table 38.3 presents the performances of these displays and we will discuss the limitations observed. 

The best results, with a dielectric layer, TajOj as electrolyte , were 

Material Response time Efficiency (cm C ) Cycle Remarks Ref 

Generally, in this kind of system with a dielectric layer, it was found that the electrochemical reaction at the interface between electrolyte layer and electrode causes gas to be produced, leading to rapid degradation of the device. 

In the case of cells with crystalline hydrated electrolytes, HUP was the most studied. The structure was the following .  

---

In an ECD, the electrolyte is used as the reservoir of cations needed for injection into the electrochromic films for either coloration or bleaching. Such a device needs fast response, chemical and electrochemical stability, reversibility and memory properties. To achieve fast coloration kinetics with WO3, the use of protonic electrolytes is very attractive since protons have the highest mobility in the electrochromic films compared with other cations. Their use would then lead to the fastest ECD performances. However, the presence of protons is not sufficient and a conductivity of... 

---