Response time of large-scale electrochromic devices

Jean-Paul Randin

doi:10.1117/12.2283637

28 March 1990 Response time of large-scale electrochromic devices

Jean-Paul Randin

Proceedings Volume 10304, Large-Area Chromogenics: Materials and Devices for Transmittance Control; 103040Y (1990) https://doi.org/10.1117/12.2283637
Event: Institutes for Advanced Optical Technologies, 1989, Hamburg, Germany

Abstract

The studies related to electrochromic phenomena performed in the seventies were mainly aimed at the development of information displays. Such applications require sm211 electrode sizes, i.e. with active surface areas of between about 0.01 to 10 cm . The development of large information devices and chiefly smart windows require much larger switching areas. This paper deals with the influence of increasing the active surface area on the response time. The latter depends on both properties of the cell components (transparent conducting layer, electrochromic film, electrolyte and counter electrode) and structure of the cell (size, shape, gap, resistivity of the busbar). Experimental devices were constructed with given components and cell geometry. The effect of a series resistance arisen mainly from the cell size was investigated and explained by the effect of the additional series resistance on the response time of a diffusion-controlled process. The study indicates that the scaling-up of W03 devices will be limited by an increase of the response time with increasing active area.

Citation Download Citation

Jean-Paul Randin "Response time of large-scale electrochromic devices", Proc. SPIE 10304, Large-Area Chromogenics: Materials and Devices for Transmittance Control, 103040Y (28 March 1990); https://doi.org/10.1117/12.2283637

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