Stretchable Photoactive Sensor Materials for Electrical Stability
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Solution Overview
Problem
Existing attachable devices, such as display panels and sensors, lack the necessary stretchability and restoration capabilities to conform to the shape and movement of objects or living bodies without compromising performance.
Innovation Solution
A sensor design incorporating a first and second electrode with different work functions and a photoactive layer composed of semiconductors and an elastomer, each with high elongation rates, allowing for high stretchability and restoration without deteriorating performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional rigid or low-stretch materials are used for electrodes and photoactive layers, then manufacturing and electrical performance are maintained, but stretchability and restoration capability are insufficient
Solution Approach 1:
The patent changes the material parameters of electrodes and photoactive layers by incorporating conductive polymers with elongation rates greater than 50% and elastomers in the photoactive layer, enabling high stretchability while maintaining electrical performance through optimized material composition and device architecture
Solution Approach 2:
The patent uses composite materials including conductive polymers combined with elastomers in the photoactive layer, and multiple layer structures with different materials (electrodes, photoactive layer, encapsulation layers) to achieve both high stretchability and reliable electrical performance
2Adaptability or versatility
If high stretchability materials are used for electrodes and photoactive layers, then stretchability and restoration are improved, but manufacturing complexity increases
Solution Approach 1:
The patent specifies precise parameter ranges for material properties (elongation rates greater than 50%, specific work function relationships between electrodes and conductive polymer) to achieve restoration capability while managing manufacturing complexity through standardized material specifications
3Adaptability or versatility
If electrodes and photoactive layers have high elongation rates, then stretchability is improved, but electrical performance stability during stretching deteriorates
Solution Approach 1:
The patent optimizes the elongation rate parameter to be greater than 50% while maintaining electrical performance stability by controlling the work function relationships between electrodes and conductive polymer, and by using elastomers in the photoactive layer that maintain electrical properties during stretching
Solution Approach 2:
The patent employs composite material structures where conductive polymers are combined with elastomers in the photoactive layer, creating a composite that maintains electrical stability during stretching through the synergistic properties of the constituent 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
The sensor achieves high stretchability and restoration, improving reliability and durability, enabling applications like biometric sensors and flexible display panels.
Implementation Method 1
a photoactive layer between the first electrode and the second electrode. The photoactive layer may include a first semiconductor and a second semiconductor having different electrical properties from each other
Implementation Method 2
The photoactive layer may include a first semiconductor and a second semiconductor having different electrical properties from each other, and an elastomer
Data Source
AI summary
A sensor includes a first electrode and a second electrode, each including a conductive polymer and having different work functions from each other, and a photoactive layer between the first electrode and the second electrode and including a first semiconductor and a second semiconductor having different electrical properties from each other, and an elastomer, wherein each of an elongation rate of the first electrode, an elongation rate of the second electrode, and an elongation rate of the photoactive layer is greater than about 50%, wherein each respective elongation rate is a percentage of a change in length from an initial length to a breaking point.