Electrochromic Composition via Electro-Spray Direct Reaction
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Solution Overview
Problem
Conventional smart window technologies, such as suspended particle devices and polymer dispersed liquid crystal electrochromic devices, face issues like high material costs, power consumption, limited color diversification, and complexity in manufacturing, which hinder their adoption for efficient solar light control and energy management.
Innovation Solution
A method for producing an inorganic-type electrochromic composition using a solution direct reaction with an electro-spray machine, incorporating a defect variant of perovskite type materials like Cs2SnXyZ6-y, where X and Z are I, Br, or Cl, to create a single-layer electrochromic device with reduced solvent consumption and simplified manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional solid direct reaction is used to produce inorganic-type electrochromic composition, then manufacturing precision can be maintained, but device complexity and manufacturing time increase significantly
Solution Approach 1:
The patent replaces the conventional solid-state mechanical reaction process with an electrochemical deposition process. Instead of physically mixing and reacting solid precursors, the invention uses electrochemical methods to deposit the electrochromic composition directly, substituting mechanical processing with electrochemical fields to achieve simpler manufacturing
Solution Approach 2:
The invention changes the fundamental reaction parameters from solid-state thermal processing to electrochemical deposition parameters. By controlling electrochemical conditions (potential, current density, electrolyte composition) rather than mechanical mixing and thermal treatment, the manufacturing process becomes simpler and more controllable
2Reliability
If multi-layer device structure is used, then functional reliability is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent merges multiple functional layers into a single integrated electrochromic composition. Instead of separate electrochromic layer, electrolyte layer, and ion storage layer, the invention combines these functions into one composition that performs all functions simultaneously, reducing structural complexity while maintaining reliability
Solution Approach 2:
The electrochromic composition developed in the patent is designed to be multi-functional, serving as both the electrochromic active layer, the electrolyte medium, and the ion storage component. This universal design allows a single layer to fulfill multiple functions that traditionally required separate layers
3Adaptability or versatility
If conventional electrochromic materials are used, then basic transmittance control is achieved, but color diversification capability is limited
Solution Approach 1:
The patent employs composite material strategies by combining different inorganic compounds within the electrochromic composition. The composition includes multiple metal oxides and salts that can be adjusted in varying ratios and combinations, enabling diverse color outcomes from a single material system rather than requiring multiple distinct materials
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
This approach enables cost-effective, low-power, and efficient solar light control with enhanced color diversification, reducing manufacturing time and complexity while maintaining a memory function without the need for an electrolyte layer, resulting in a more efficient and versatile electrochromic device.
Implementation Method 1
loading, respectively, the first coating composition and the second composition into an electro-spray machine and spraying the first coating composition and the second coating composition under application of a voltage to the electro-spray device
Implementation Method 2
forming a electrochromic composition by reacting the first electrochromic compound with the second electrochromic compound during spraying
Implementation Method 3
a defect variant of perovskite type in which the halide is located at the corners of a cube and is connected via the tin atom from the Coulomb interactions between the particular ions
Data Source
AI summary
Disclosed are a method of producing an electrochromic composition capable of diversifying colors, an electrochromic composition produced thereby, and an electrochromic device including the electrochromic composition. The electrochromic composition may be produced through a solution direct reaction using an electro-spray machine including two nozzles symmetrically inclined toward a central axis. The method may include preparing, respectively, a first coating composition comprising a first electrochromic compound and a second coating composition comprising a second electrochromic compound; loading, respectively, the first coating composition and the second composition into an electro-spray machine; spraying the first coating composition and the second coating composition under application of a voltage to the electro-spray device; and forming a electrochromic composition by reacting the first electrochromic compound with the second electrochromic compound during spraying.