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Silver Alloy Electrodes in Electrochromic Display Module Disclosure Number: IPCOM000039318D
Original Publication Date: 1987-May-01
Included in the Prior Art Database: 2005-Feb-01

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Barclay, DJ Morgan, WM Pietrzak, CC [+details]


In an electrochromic display module with silver pel electrodes, frequently written pels darken relative to infrequently written pels. This delineation problem is reduced by using silver alloy containing relatively small amounts of the alloying metal. The delineation problem has been shown to be caused by a restructuring of the silver pel surface. Essentially silver is removed, during cycling, from high energy grain boundaries and redeposited on lower energy crystal faces. It is known from the literature that a few tenths of a percent and below of alloying metals, such as Cu and Pd, significantly increase the recrystallization temperature of silver, and it could therefore be expected that these alloying elements would favorably influence restructuring. Additions of up to 0.