Anodic Electrochromic Compound Composition for Solubility and Color Stability

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Solution Overview

Problem

Anodically-coloring electrochromic materials often have inadequate solubility in liquid electrochromic compositions, limiting their performance and reproducibility.

Innovation Solution

An electrochromic device comprising a cathodic component, an anodic component, an electrolyte, and a polymer matrix, with the anodic component containing an anodically-coloring electrochromic compound represented by Formula (I), where R1 and R2 are independently selected from linear or branched C3-C20 alkyl groups, enhancing solubility and performance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If anodically-coloring electrochromic materials are used, then color reproducibility and contrast are improved, but solubility in liquid electrochromic compositions deteriorates

Engineering Contradiction:

Improvecolor reproducibilityVSAvoidsolubility

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

The patent modifies the molecular structure of anodically-coloring electrochromic materials by introducing specific substituent groups (such as alkoxy, alkyl, or halogen groups at positions 6 and 7 of the coumarin ring system) to change the solubility parameters while preserving the electrochromic active species. This allows the material to maintain good color reproducibility and contrast while achieving adequate solubility in liquid electrochromic compositions for proper device fabrication.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If anodically-coloring electrochromic materials are used, then color reproducibility and contrast are improved, but device fabrication becomes more difficult

Engineering Contradiction:

Improvecolor reproducibilityVSAvoidfabrication

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

By modifying the solubility parameters of anodically-coloring electrochromic materials through strategic substituent placement, the patent enables these materials to be dissolved in liquid electrochromic compositions, thereby facilitating standard device fabrication processes such as spin-coating or dip-coating while maintaining the desired color reproducibility and contrast performance.

Inventive Principle:

Principle #35Parameter changes

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Improves the solubility and performance of anodically-coloring electrochromic materials, providing better color reproducibility and contrast in electrochromic devices.

Implementation Method 1

Anodically-coloring electrochromic materials... provide an advantageous degree of color reproducibility and contrast

Methodology Applied

Scientific EffectElectrochromism: Electrochromism

Implementation Method 2

a material that generates color while undergoing oxidation is referred to as an anodically-coloring electrochromic material

Methodology Applied

Scientific EffectOxidation: Oxidation

Data Source

PatentUS20250340776A1Anodically-Coloring Electrochromic Compounds, and Devices and Compositions Containing Same

Publication Date: 2025.11.06 VITRO FLAT GLASS LLC

AI summary

The present invention relates to an anodically-coloring electrochromic compound represented by the following Formula (I),With reference to Formula (I), R1 and R2 are each independently selected from linear or branched C3-C20 alkyl. The present invention also relates to electrochromic devices and compositions that include an anodically-coloring electrochromic compound represented by Formula (I).