Electrochromic film and an electrochromic device comprising the same
AssigneeLG Chem, Ltd.
InventorsYong Chan Kim, Ki Hwan Kim
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Abstract
An electrochromic film and an electrochromic device including the electrochromic film are disclosed. The electrochromic film includes an electrochromic layer and a passivation layer on one side of the electrochromic layer. The coloration level of the electrochromic film is different from the coloration level of the passivation layer. The film may change optical properties as a result of electrochromism according to an electrochemical reaction. The electrochromic film and the electrochromic device have improved electrochromism, excellent durability, excellent color-switching speed, and stepwise control of optical properties.
Claims18
An electrochromic film, comprising:
- an electrochromic layer;
- and
- a passivation layer on one side of the electrochromic layer,
- wherein the passivation layer can be colored and bleached in use by an electrochemical reaction,
- wherein the passivation layer comprises a metal oxynitride that comprises two or more metals selected from Ti, Nb, Mo, Ta and W,
- wherein the passivation layer has a coloration level different from a coloration level of the electrochromic layer, and
- wherein the coloration level is a minimum magnitude (absolute value) of a voltage which is applied in use to a layer capable of electrochromism to cause color change.
Dependencies are inferred from the claim text.