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Published on: November 11, 2013
An in situ rewritable electrically-erasable photo-memory device for terahertz waves
Luyao Xiong1, Bin Liu1, Dandan Liu1
1Key Laboratory of Terahertz Optoelectronics, Ministry of Education, Beijing Advanced Innovation Center for Imaging Theory and Technology, Beijing Key Laboratory for Terahertz Spectroscopy and Imaging, Beijing Key Laboratory of Metamaterials and Devices, Department of Physics, Capital Normal University, Beijing, 100048 China. bzhang@cnu.edu.cn sjl-phy@cnu.edu.cn.
Researchers developed a novel photo-memory device using perovskite:Ag/SnO2/PEDOT:PSS. This terahertz device offers in situ electrical erasing capabilities, enabling rewritable data storage with optical control.
Area of Science:
- Materials Science
- Optoelectronics
- Nanotechnology
Background:
- Terahertz (THz) technology is crucial for advanced data storage and sensing.
- Developing efficient and rewritable photo-memory devices remains a significant challenge.
- Perovskite-based heterostructures show promise for optoelectronic applications.
Purpose of the Study:
- To report a novel terahertz photo-memory device.
- To investigate the effect of a SnO2 nanoparticle interlayer on device performance.
- To demonstrate in situ electrical-erasable rewritable functionality.
Main Methods:
- Fabrication of a perovskite:Ag/SnO2/PEDOT:PSS heterojunction device.
- Characterization of terahertz amplitude modulation under optical excitation.
- Evaluation of device performance with and without the SnO2 interlayer.
- Testing of in situ electrical erasing capabilities.
Main Results:
- Achieved considerable terahertz amplitude modulation in perovskite:Ag/PEDOT:PSS.
- Insertion of SnO2 reduced terahertz signal attenuation but prolonged recovery time.
- Bias voltage application enabled rapid terahertz signal recovery for both structures.
- Demonstrated successful photo-memory functionality with in situ electrical erasing.
Conclusions:
- The perovskite:Ag/SnO2/PEDOT:PSS heterostructure enables a functional terahertz photo-memory device.
- The SnO2 interlayer plays a critical role in modulating terahertz signal dynamics.
- In situ electrical erasing provides a practical method for rewritable data storage.
