Organic Electrochromic Compounds for Fast Light Modulation
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Solution Overview
Problem
Current light modulating devices face challenges with inorganic oxides, which have slow electrochromic rates and limited color variation, while organic systems with conjugated polymers suffer from high energy consumption and incomplete transparency due to deep colors that require electrification for transparency.
Innovation Solution
An organic compound with a specific chemical structure is used in a light modulating composition and device, comprising a pair of electrodes and an isolating unit, allowing for color change without the need for continuous electrification, achieving stable and efficient electrochromic performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If inorganic oxides are used for light modulating devices, then longer lifetime and endurance are achieved, but expensive processes and equipment are required and electrochromic rate is slow
Solution Approach 1:
The patent changes the material parameter from inorganic oxides to specifically designed organic compounds with particular molecular structures (formula I and II), achieving both long lifetime and reduced manufacturing costs through solution processing
2Duration of action of stationary object
If inorganic oxides are used for light modulating devices, then longer lifetime is achieved, but electrochromic rate becomes slow
Solution Approach 1:
The patent changes the material parameter from inorganic oxides to organic compounds with specific molecular structures, achieving both long lifetime and fast electrochromic rates through molecular design and solution processing
3Illumination intensity
If conjugated polymer is used for light modulating devices, then color variation and fast electrochromic rates are achieved, but high energy consumption occurs due to deep color requiring electrification for transparency
Solution Approach 1:
The patent changes the molecular structure parameter by using specific organic compound structures (formula I and II) with controlled conjugation lengths, achieving good color variation while reducing deep color formation and associated energy consumption
Solution Approach 2:
The patent uses composite light modulating compositions containing organic compounds combined with electrolytes and solvents, achieving balanced performance in color variation, energy consumption, and stability
4Speed
If conjugated polymer is used for light modulating devices, then fast electrochromic rate is achieved, but incomplete transparency occurs due to deep color
Solution Approach 1:
The patent changes the molecular structure parameter by using specific organic compound structures with controlled conjugation lengths and substitution patterns, achieving fast electrochromic rates while improving transparency through reduced deep color formation
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-based light modulating device exhibits rapid color change and high stability, maintaining functionality through 10,000 cycles with minimal energy consumption, offering improved transparency and color variation without continuous voltage application.
Implementation Method 1
the major part of light modulating material is inorganic oxides... however, films thereof are prepared by using expensive processes and equipment such as vacuum deposition, spray pyrolysis, or sputtering. Even ignoring the cost of processing, the inorganic oxide still has shortcomings such as a slow electrochromic rate
Implementation Method 2
a first oxidizable compound, a reducible compound, an electrolyte and a solvent, wherein the first oxidizable compound includes the aforementioned organic compound
Data Source
AI summary
An organic compound, a light modulating composition and a light modulating device are provided. The organic compound has a chemical structure represented by formula (I):X—Ar—X (I)wherein X isAr isThe organic compound is transparent in its neutral state. The amide group or imide group introduced into the aromatic amine not only enhances the solubility of the organic compound in the solvent, but also enhances the electrochemical stability of the organic compound.