Optical switching of y-hybride thin film electrodes : a remarkable electrochromic phenomenom

P.H.L. Notten, M. Kremers, R. Griessen

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The optical appearance of yttrium thin film electrodes can be electrochemically switched from mirrorlike to highly transparent by making use of the hydride-forming properties of Y. A strong alkaline solution is a suitable electrolytic environment for obtaining stable electrochromic electrodes. The presence of a thin Pd layer covering the Y electrode is essential in providing a sufficiently high electrocatalytic activity for the electrochemical charge-transfer reaction. Hydrogen is irreversibly bound in Y-dihydride and reversibly bound in Y-trihydride. The optical changes are reversible and are induced within a narrow hydrogen concentration range, making this typical electrode material interesting for application in a new type of electrochromic devices.
Original languageEnglish
Pages (from-to)3348-3353
Number of pages6
JournalJournal of the Electrochemical Society
Issue number10
Publication statusPublished - 1996

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