Graphene/Semiconductor Heterostructure Wireless Energy Harvester through Hot Electron Excitation
Yangfan Xuan1, Hong Chen1, Yan Chen1
1College of Microelectronics, College of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, China.
Research (Washington, D.C.)
|June 23, 2020
Summary
This study demonstrates a novel graphene-based rectenna for harvesting radio frequency (RF) energy from 5G wireless networks. The device efficiently converts RF waves into electrical power, enabling long-term operation of wireless sensors.
Area of Science:
- Materials Science
- Electrical Engineering
- Quantum Physics
Background:
- Wireless energy harvesting is crucial for powering wireless sensor applications, reducing battery maintenance and replacement.
- Current rectenna research primarily uses metal-insulator-metal tunneling diodes, limiting efficiency.
- 5G networks offer a viable source of radio frequency (RF) energy for harvesting.
Purpose of the Study:
- To demonstrate a new method for harvesting RF energy from 5G wireless sources.
- To explore the use of graphene's unique properties for efficient energy conversion.
- To develop a rectenna that overcomes limitations of existing technologies.
Main Methods:
- Utilizing plasmon excitation and quantum tunneling between graphene and GaAs/GaN.
- Investigating energy harvesting from a 915 MHz 5G FR1 band wireless source.
- Analyzing the generated current and voltage under RF illumination.
Main Results:
- Demonstrated continuous current and voltage generation from RF waves.
- Achieved rapid current increase up to 10^-7 A under RF illumination.
- Showcased multi-channel harvesting capability from various wireless energy flows.
Conclusions:
- Graphene-based rectennas offer a promising new approach for wireless energy harvesting.
- Quantum tunneling and graphene's properties enable efficient RF energy conversion.
- This technology paves the way for self-sustaining wireless sensor networks.
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