Stretchable Optoelectronic Diode Composite Layer for Electrical Stability
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Solution Overview
Problem
Existing stretchable devices face limitations in stretchability, as they can be damaged or broken when stretched, leading to deteriorated electrical characteristics.
Innovation Solution
A stretchable device is designed with a stretchable substrate and a plurality of optoelectronic diodes, where each diode includes a first electrode, a second electrode, and an active layer comprising a first semiconductor, a second semiconductor with different electrical characteristics, and an insulating elastomer, which enhances the device's mechanical and electrical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the device is stretched to improve flexibility and adaptability, then the device can conform to curved surfaces and move with living bodies, but the device may be broken or damaged and electrical characteristics deteriorate
Solution Approach 1:
The patent uses a composite active layer containing first semiconductor, second semiconductor, and insulating elastomer. The insulating elastomer acts as a matrix that maintains structural integrity during stretching while the semiconductor particles provide electrical functionality. This composite structure resolves the contradiction by combining materials with complementary properties: the elastomer provides flexibility and mechanical strength, while the semiconductor maintains electrical characteristics even when the device is stretched.
2Adaptability or versatility
If the device is stretched to improve adaptability, then the device can respond to shape changes and movement, but electrical characteristics deteriorate due to damage
Solution Approach 1:
The active layer composite maintains electrical characteristics during stretching because the insulating elastomer matrix prevents complete separation of semiconductor particles, and the particle network remains connected even under deformation. The elastomer's elasticity allows the structure to return to its original state, preserving electrical pathways.
Solution Approach 2:
The patent creates local regions with different properties within the active layer. The insulating elastomer provides mechanical flexibility in certain regions while semiconductor particles maintain electrical conductivity in other regions. This spatial differentiation allows the material to simultaneously exhibit both flexible mechanical properties and stable electrical properties during stretching.
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 solution allows for improved mechanical properties without significantly compromising the electrical characteristics of the stretchable device, enabling it to maintain functionality and integrity during stretching.
Implementation Method 1
an insulating elastomer
Implementation Method 2
an active layer between the first electrode and the second electrode and including a first semiconductor, a second semiconductor having different electrical characteristics from the first semiconductor
Data Source
AI summary
A stretchable device includes a stretchable substrate, and a plurality of optoelectronic diodes on the stretchable substrate. At least one optoelectronic diode includes a first electrode and a second electrode, and an active layer between the first electrode and the second electrode. The active layer includes a first semiconductor, a second semiconductor having different electrical characteristics from the first semiconductor, and an insulating elastomer.