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Ferroelectric Polarization Electric Field Induced High Performance Graphene/LiNbO3 Dynamic Diode Generator
Bo Wang1, Yan Cao1,2, Xutao Yu1,2
1Smart Materials for Architecture Research Lab, Innovation Center of Yangtze River Delta, Zhejiang University, Jiaxing, 314100, China.
Advanced Materials (Deerfield Beach, Fla.)
|May 28, 2025
Summary
Researchers developed a new vertical graphene/LiNbO3 dynamic semiconductor diode generator (DDG). This device achieves ultra-high voltage output, enabling direct powering of electronics and efficient mechanical energy harvesting from the environment.
Area of Science:
- Materials Science
- Energy Harvesting
- Nanotechnology
Background:
- Dynamic semiconductor diode generators (DDGs) are promising for miniature, portable energy harvesting.
- Current DDGs typically produce less than 1 V, limiting practical applications.
- Improving DDG output voltage is crucial for widespread adoption.
Purpose of the Study:
- To propose a novel vertical graphene/LiNbO3 DDG for ultra-high voltage output.
- To investigate the synergistic effects enhancing energy generation.
- To demonstrate the device's capability for direct electronic powering.
Main Methods:
- Fabrication of a vertical graphene/LiNbO3 heterostructure.
- Characterization of the device's electrical output under mechanical stress.
- Analysis of the coupling enhancement effect between ferroelectric polarization and interface electric fields.
Main Results:
- Achieved an ultra-high open-circuit voltage of 41.3 V and short-circuit current of 1.53 µA.
- Demonstrated direct powering of an LED without external circuits.
- Exhibited stable performance with no attenuation after 3 hours of continuous operation.
Conclusions:
- The vertical graphene/LiNbO3 DDG significantly enhances voltage output through synergistic electric fields.
- This technology improves the feasibility of real-time energy supply for electronic components.
- Paves the way for efficient environmental mechanical energy harvesting.
Keywords:
built‐in electric fielddynamic diode generatorferroelectric polarizationgraphenehot carrier dynamicsMore Related Videos
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