Multiaxial Strain Engineering Defect Doped Materials
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Solution Overview
Problem
Wide electronic bandgap materials, such as diamond, often lack sufficient charge carriers to function as semiconducting or conducting materials due to deep dopant states with high activation energies, making them difficult to dope effectively at room temperature.
Innovation Solution
Applying multiaxial strain to defect doped materials can transition deep dopant states to shallow states, reducing activation energy and enabling the formation of charge carriers, thereby toggling the material between non-conducting, semiconducting, and conducting states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If defect doped materials are used to increase charge carrier concentration, then electrical conductivity is improved, but the activation energy remains too high for effective doping at room temperature
Solution Approach 1:
The patent applies multiaxial strain as a physical parameter change to modify the electronic band structure of defect-doped wide bandgap materials. By applying strain along multiple axes, the energy levels of defect states are shifted, reducing the activation energy required for charge carrier generation while maintaining the material's inherent high conductivity potential
Solution Approach 2:
The patent transitions from conventional single-axis or isotropic strain approaches to multiaxial strain application, adding dimensional complexity to the strain field. This multiaxial approach enables simultaneous modification of multiple crystallographic directions, effectively tuning the electronic structure to achieve lower activation energies that cannot be obtained through uniaxial strain alone
2Adaptability or versatility
If wide electronic bandgap materials are doped to increase charge carriers, then semiconducting functionality is achieved, but the deep dopant states prevent effective ionization at room temperature
Solution Approach 1:
The patent uses multiaxial strain to dynamically change the energy parameter of defect states, transforming deep dopant states into shallower states that can be thermally ionized at room temperature. This parameter change enables the material to transition from a non-conducting state to a semiconducting state with sufficient charge carriers
Solution Approach 2:
The patent introduces dynamic control over the electronic properties of the material through time-dependent multiaxial strain application. By dynamically adjusting the strain magnitude and orientation, the activation energy of defect states can be modulated in real-time, enabling switching between conducting and non-conducting states for device applications
Data Source
AI summary
Compositions and methods related to multiaxially straining defect doped materials as well as their use in electrical circuits are generally described.