Triarylamine Electrochromic Compound for Repetition Durability
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Solution Overview
Problem
Existing electrochromic elements lack repetition durability, meaning they experience a decrease in coloring property when repeatedly switched between colored and decolored states, despite improvements in light durability.
Innovation Solution
An electrochromic composition comprising a radical-polymerizable electrochromic compound with a triarylamine backbone, specifically a triphenylamine derivative, which is designed to maintain stability and performance through the inclusion of polymerizable functional groups and a tetraphenyl benzidine compound, enhancing durability against repetitive electrostatic charging/charge-removing processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If electrochromic elements are designed for multicolor display, then display functionality is improved, but structural complexity increases
Solution Approach 1:
The triarylamine-based electrochromic compound exhibits multi-functional properties, serving as both the electrochromic active material and providing structural stability. The compound's ability to achieve multiple oxidation states and corresponding color changes enables multicolor display functionality while maintaining a relatively simple single-layer structure, thus improving versatility without proportionally increasing complexity.
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 composition exhibits excellent repetition durability and light durability, ensuring stable optical properties and color retention even after repeated switching, thereby improving the performance of electrochromic elements in display devices.
Implementation Method 1
electrochromic compounds that cause electrochromism... As a forward voltage or a reverse voltage is applied to the electrochromic element, the electrochromic compound is colored or decolored
Implementation Method 2
An electrochromic composition comprising an electrochromic compound having a structure represented by the following general formula (1)... a radical-polymerizable electrochromic compound with a triarylamine backbone... inclusion of polymerizable functional groups
Data Source
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AI summary
An electrochromic compound having a structure represented by the following general formula (1):where each of X1 to X3 independently represents a carbon atom or a silicon atom, and each of R1 to R15 independently represents a member selected from the group consisting of a hydrogen atom, a halogen atom, a monovalent organic group, and a polymerizable functional group.