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Proceedings Paper

Response time of large-scale electrochromic devices
Author(s): Jean-Paul Randin
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Paper 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.

Paper Details

Date Published: 28 March 1990
PDF: 9 pages
Proc. SPIE 10304, Large-Area Chromogenics: Materials and Devices for Transmittance Control, 103040Y (28 March 1990); doi: 10.1117/12.2283637
Show Author Affiliations
Jean-Paul Randin, Research Labs. of the SMH Group (Switzerland)


Published in SPIE Proceedings Vol. 10304:
Large-Area Chromogenics: Materials and Devices for Transmittance Control
Carl M. Lampert; Claes-Göran Granqvist, Editor(s)

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