Electrochromic Material Red Color Stability
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Solution Overview
Problem
Current electrochromic devices lack red electrochromic materials, which are essential for achieving full-color displays, and organic electrochromic materials have limitations in long-term stability compared to inorganic materials.
Innovation Solution
Development of a novel electrochromic material represented by Formula 1, which can produce a red color when a voltage is applied, and its integration into an electrochromic device structure with transparent and opposite electrodes to form a functional electrochromic layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If organic electrochromic materials are used, then flexibility and ease of thin film formation are improved, but long-term stability deteriorates
Solution Approach 1:
The patent employs a composite material strategy by combining the organic electrochromic compound (Formula 1) with an inorganic electrochromic material (tungsten oxide, molybdenum oxide, or their alloys) in the electrochromic layer. This composite structure allows the device to inherit the flexibility and thin film formation capability from the organic component while gaining the long-term stability from the inorganic component, thus resolving the contradiction between flexibility and stability.
2Adaptability or versatility
If red electrochromic materials are developed, then full-color display capability is improved, but material discovery difficulty increases
Solution Approach 1:
The patent achieves red electrochromic color by systematically varying the molecular structure parameters of the organic compound, specifically by changing the substituents (R1, R2, R3) at different positions of the core molecular framework. By adjusting these structural parameters, the patent successfully tuned the electrochromic color to red while maintaining the benefits of organic materials, thus achieving full-color display capability without excessive discovery difficulty.
3Reliability
If inorganic electrochromic materials are used, then long-term stability is improved, but flexibility and thin film formation capability deteriorate
Solution Approach 1:
The patent creates a composite electrochromic layer that integrates inorganic electrochromic materials (tungsten oxide, molybdenum oxide, or their alloys) with organic electrochromic compounds. The inorganic component provides the necessary long-term stability, while the organic component and the overall composite structure enable flexibility and ease of thin film formation through wet processing techniques, thus resolving the contradiction between stability and flexibility.
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 electrochromic device using the novel material can change colors in response to applied voltages, achieving red and other colors effectively, enhancing the potential for full-color displays and overcoming stability issues of organic materials.
Implementation Method 1
Electrochromism is the phenomenon displayed by some chemical species which have a reversibly changeable color when a voltage is applied thereto. A material capable of undergoing reversible changes of optical properties by the electrochemical redox reaction accompanying such electrochromic properties is called an electrochromic material.
Implementation Method 2
A material capable of undergoing reversible changes of optical properties by the electrochemical redox reaction accompanying such electrochromic properties is called an electrochromic material.
Data Source
AI summary
Disclosed herein are novel electrochromic materials. The electrochromic materials produce various colors. The electrochromic materials can be used to form red electrochromic layers in a simple manner. Therefore, the electrochromic materials are suitable for use in the fabrication of RGB full-color electrochromic devices. Also disclosed herein are electrochromic devices fabricated using the electrochromic materials.