Electrochromic Thin Film Uniformity via Microsphere Template
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Solution Overview
Problem
Conventional organic-inorganic composite electrochromic thin films experience significant variations in transmittance across different regions of large-sized electrochromic devices, such as floor-to-ceiling windows or car windows, leading to degraded display uniformity and effectiveness.
Innovation Solution
The method involves forming a mesh-like microsphere-film on a substrate, depositing an inorganic electrochromic film within the voids of the microsphere-film, removing the microsphere-film, and then allowing the inorganic electrochromic film to undergo a polymerization reaction with an organic electrochromic solution, resulting in a uniform organic-inorganic electrochromic thin film that maintains consistent transmittance across various regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If conventional organic-inorganic composite electrochromic thin films are used in large-sized electrochromic devices, then the device size is increased, but the uniformity of transmittance across different regions deteriorates significantly
Solution Approach 1:
The patent applies segmentation by dividing the electrochromic thin film into distinct organic and inorganic layers with specific functional divisions. The inorganic electrochromic layer provides stable coloring while the organic electrochromic layer enhances response speed, creating a segmented structure that maintains uniform performance across large device areas by optimizing each layer's contribution to overall transmittance control
Solution Approach 2:
The patent employs composite materials by combining organic and inorganic electrochromic materials in a multi-layered thin film structure. This composite approach leverages the advantages of both material types - the inorganic layer provides high cycling stability and strong adhesion, while the organic layer contributes fast response and rich color changes, achieving uniform transmittance characteristics across large device areas that neither material could achieve alone
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 ensures minimal transmittance differences across different regions of large-sized electrochromic devices, enhancing the display effect and maintaining uniformity even in large-scale applications.
Implementation Method 1
making the inorganic electrochromic film and an organic electrochromic solution undergo a polymerization reaction
Implementation Method 2
Under the action of an external electric field, an electrochromic material undergoes an oxidation-reduction reaction and at the same time causes a reversible change in light transmission or reflection
Implementation Method 3
forming an inorganic electrochromic film in voids of the microsphere-film
Data Source
AI summary
An electrochromic thin film, an electrochromic device, and a manufacturing method thereof are disclosed. The electrochromic device comprises: a first substrate and a second substrate provided opposite to each other, a first transparent electrically-conductive layer provided on the inner side of the first substrate, a second transparent electrically-conductive layer provided on the inner side of the second substrate, an organic-inorganic electrochromic thin film provided between the first transparent electrically-conductive layer and the second transparent electrically-conductive layer. The organic-inorganic electrochromic thin film is obtained by forming a mesh-like microsphere-film on the first transparent electrically-conductive layer; forming an inorganic electrochromic film in the voids of the microsphere-film and removing the microsphere-film; and making the inorganic electrochromic film and an organic electrochromic solution undergo a polymerization reaction.