Relaxation Mechanism of Electrochromism of Tungsten-Oxide Film for Ultra-Multilayer Optical Recording Depending on Sputtering Conditions

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Published 22 June 2007 Copyright (c) 2007 The Japan Society of Applied Physics
, , Citation Ryuji Sato et al 2007 Jpn. J. Appl. Phys. 46 3958 DOI 10.1143/JJAP.46.3958

1347-4065/46/6S/3958

Abstract

A tungsten-oxide single-layer film can be colored densely by using dilute sulfuric acid as a liquid electrolyte instead of the multilayer electrochromic cell. The transmissivity contrast before and after coloration reaches 70% at a wavelength of 405 nm. The bleaching relaxation time of a colored tungsten-oxide single-layer film is in the order of 1000 hours and depends on the sputtering power.

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10.1143/JJAP.46.3958