Electrochromic device

• US 20030184839A1
• Filed: 02/10/2003
• Published: 10/02/2003
• Est. Priority Date: 02/18/1999
• Status: Active Grant

• Current Assignee: Nippon Mitsubishi Oil Corporation (ENEOS Holdings, Inc.)
• Original Assignee: Nippon Mitsubishi Oil Corporation (ENEOS Holdings, Inc.)
• Inventors: Minami, Masaki, Iaki, Keizo, Kobayashi, Masaaki, Kubo, Takaya, Nishikitani, Yoshinori, Imafuku, Hiroshi
• Granted Patent: US 6,816,298 B2
• Time in Patent Office: Days
• US Class Current: 359/265
• CPC Class Codes: C09K 2211/1029 containing one nitrogen atom as the heteroatom
• CPC Class Codes: C09K 2211/187 of the iron group metals, i.e. Fe, Co or Ni
• CPC Class Codes: C09K 9/02 Organic tenebrescent materials
• CPC Class Codes: G02F 1/1503 caused by oxidation-reduction reactions in organic liquid solutions, e.g. viologen solutions
• CPC Class Codes: G02F 1/1516 comprising organic material
• CPC Class Codes: G02F 2001/1502 complementary cell
• CPC Class Codes: G02F 2001/15145 the electrochromic layer comprises a mixture of anodic and cathodic compounds

Abstract

An electrochromic element comprises an ion conduction layer between two conducting substrates, at least one of which is transparent. The ion conduction layer contains an organic compounds, which has both a structure exhibiting a cathodic electrochromic characteristic and a structure exhibiting an anodic electrochromic characteristic.

Claims

1. An electrochromic device having an ion conductive layer disposed between two electrically conductive substrates, at least one of which is transparent, wherein said ion conductive layer contains an organic compound having a structure exhibiting a cathodic electrochromic characteristic and a structure exhibiting an anodic electrochromic characteristic.

2. The electrochromic device according to claim 1, wherein said structure exhibiting a cathodic electrochromic characteristic is a bipyridinium ion-pair structure represented by formula (1) below, and said structure exhibiting an anodic electrochromic characteristic is a metallocene structure represented by the formula (2) or (3) below: