Electrochromic Organic Compound for Full-Color Displays
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Solution Overview
Problem
Current electrochromic materials lack the range of color tones and stability required for widespread applications, particularly in full-color displays, and require improvement in durability and repeated use.
Innovation Solution
An organic compound represented by general formula (1) or (2) with specific substituents and anions, which changes transmittance in the blue spectrum through redox reactions, is used in an electrochromic element to achieve reversible coloration and breaching, allowing for a wider range of color production and improved stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing electrochromic materials are used, then basic color change function is achieved, but the range of color tones is limited and stability in repeated use is insufficient
Solution Approach 1:
The patent employs composite electrochromic materials combining multiple components: a first electrochromic material (compounds of formula 1 or 2), a second electrochromic material, and a mediator. This composite approach enables the system to achieve a broader range of color tones (yellow, cyan, magenta) while maintaining stability through 10,000 repeated redox cycles, resolving the contradiction between color versatility and reliability
2Adaptability or versatility
If simple electrochromic compounds are used, then device complexity is reduced, but the ability to produce full-color displays is insufficient
Solution Approach 1:
The patent divides the electrochromic system into segmented functional components: specific pyridine/isoquinoline compounds (formula 1 or 2) for yellow color, complementary electrochromic materials for cyan and magenta, and mediators for electron transfer. This segmentation allows each component to be optimized for its specific function while collectively achieving full-color display capability without excessive overall complexity
3Illumination intensity
If electrochromic materials with high coloration efficiency are used, then light absorption is improved, but durability in long-term use deteriorates
Solution Approach 1:
The patent modifies molecular parameters of the electrochromic compounds, specifically using substituted pyridine and isoquinoline structures with particular substituents (X1, X2, R11-R20) to optimize both coloration efficiency and stability. The compounds maintain high light absorption in the blue spectrum while demonstrating exceptional durability through 10,000 repeated redox cycles, resolving the trade-off between absorption efficiency and long-term durability
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
The organic compound enables an electrochromic element that absorbs light in the blue spectrum, can be reversibly colored and breached, and demonstrates stability through 10,000 redox cycles, expanding applications to optical filters, lens units, imaging devices, and window components.
Implementation Method 1
an organic compound that changes its transmittance for light in the blue spectrum through redox reaction
Implementation Method 2
materials that change their optical absorption properties (colors and optical transmittance) through electrochemical redox reaction
Data Source
AI summary
Provided is an organic compound represented by general formula (1) or (2):where in general formulae (1) and (2), X1 and X2 are each independently selected from a substituted or unsubstituted alkyl group and a substituted or unsubstituted aralkyl group, and R11 to R20 represent a hydrogen atom or a substituent. A1−and A2−each independently represent a monovalent anion.