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Ultrathin electrochromic device for high optical modulation

An electrochromic and electrochromic layer technology, applied in optics, nonlinear optics, instruments, etc., can solve the problems of low internal device resistance, enlarged device volume, and reduced switching speed

Pending Publication Date: 2021-05-07
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, in electrochromic devices utilizing electrolytes, the low ion mobility of the electrolytes can lead to reduced switching speeds and temperature dependence issues
Ion intercalation can also occur in the electrochromic layer of electrolyte-based devices, which leads to bulky devices and the resulting mechanical stress can limit the ability of the device to operate between on and off cycles
In such devices, there is a trade-off between high-speed switching and uniform switching, since high ion mobility can lead to very low internal device resistance for larger area devices, and this can result in an applied across the entire device area. inhomogeneous electric field
Another limitation of some electrochromic devices is the need for continuous application of electrical power to maintain changes in the optical properties of the electrochromic material

Method used

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  • Ultrathin electrochromic device for high optical modulation
  • Ultrathin electrochromic device for high optical modulation
  • Ultrathin electrochromic device for high optical modulation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0086] Embodiment 1 is an electrochromic element, the electrochromic element comprising:

[0087] a first electrode layer, wherein the first electrode layer comprises a transparent conductive material;

[0088] A first electrochromic layer in electrical communication with the first electrode layer, wherein the first electrochromic layer comprises a p-type electrochromic material.

[0089] an insulating layer in electrical communication with said first electrochromic layer, wherein said insulating layer comprises an electrically insulating material characterized by a band gap of at least 5 eV, a conduction band minimum of at least 2 eV relative to the Fermi level of the material, or at least one of a dielectric constant of at least 5;

[0090] a second electrochromic layer in electrical communication with the insulating layer, wherein the second electrochromic layer comprises an n-type electrochromic material; and

[0091] A second electrode layer in electrical communication ...

Embodiment approach 2

[0092] Embodiment 2 The electrochromic element according to Embodiment 1, wherein the second electrode includes first and second surfaces, and wherein the first surface includes a nanostructured surface morphology.

Embodiment approach 3

[0093] Embodiment 3 The electrochromic element according to Embodiment 1, wherein the element further includes a buffer layer disposed between and electrically communicating with the first electrode layer and the first electrochromic layer.

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Abstract

The present disclosure relates to electrochromic devices including an insulating layer and at least one electrochromic material having one or more optical properties that may be changed upon application of an electric potential. The device may include a conductive nanoparticle layer and / or a buffer layer. Upon provision of an electric potential above a threshold, electrons and holes may be injected into the electrochromic material and blocked by the insulating layer, resulting in an accumulation of the electrons and holes in their respective electrochromic material resulting in a change to the one or more optical properties of the electrochromic material. An opposite electric potential may be provided to reverse the change in the one or more optical properties.

Description

[0001] Inventor: Ma Liping [0002] Cross References to Related Applications [0003] This application claims priority to U.S. Provisional Application 62 / 722,069, filed August 23, 2018, and U.S. Provisional Application 62 / 821,910, filed March 21, 2019, both of which are incorporated herein by reference in their entirety. technical field [0004] The present disclosure relates to electrochromic elements and devices comprising an insulating layer and an electrochromic material having one or more optical properties that can be changed from a first optical property state to a second optical property upon application of an electrical potential state. Background technique [0005] Electrochromic coatings or materials can be used for many different purposes. One such purpose includes controlling light and heat through a window based on a user-controlled electrical potential applied to an electrochromic coating. Electrochromic coatings or materials can reduce the amount of energ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1523
CPCG02F1/1523G02F1/1524G02F2001/1536G02F1/155G02F1/1533G02F2001/164
Inventor 马立平
Owner NITTO DENKO CORP