An electrochromic device consisting of a cathodically coloring tungsten trioxide film and an anodically coloring Prussian blue (PB) film may find use in automotive "smart windows." These windows have prospects for reduction of solar heat load on air conditioning systems and privacy applications in automobiles. Such windows must have good stability at elevated temperatures. The thermal stability and electrochromic switching performance of a complementary device is reported over the temperature range of 25 to 80°C. The device showed good thermal stability up to 80°C. Electrochromic switching was found to be faster at elevated temperatures.
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Habib et al. (1992) studied this question.