Electrically and Optically Readable Light Emitting Memories

Electrochemical metallization memories based on redox-induced resistance switching have been considered as the next-generation electronic storage devices. However, the electronic signals suffer from the interconnect delay and the limited reading speed, which are the major obstacles for memory perfor...

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Bibliographic Details
Published in:Scientific reports 2014-06, Vol.4 (1), p.5121-5121, Article 5121
Main Authors: Chang, Che-Wei, Tan, Wei-Chun, Lu, Meng-Lin, Pan, Tai-Chun, Yang, Ying-Jay, Chen, Yang-Fang
Format: Article
Language:English
Subjects:
639/166/987
639/301/1005/1007
Chemical vapor deposition
Communication
Data processing
Geographic information systems
Graphene
Humanities and Social Sciences
Light emitting diodes
multidisciplinary
Quantum dots
Random access memory
Reading
Science
Semiconductors
Sensors
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Summary:Electrochemical metallization memories based on redox-induced resistance switching have been considered as the next-generation electronic storage devices. However, the electronic signals suffer from the interconnect delay and the limited reading speed, which are the major obstacles for memory performance. To solve this problem, here we demonstrate the first attempt of light-emitting memory (LEM) that uses SiO 2 as the resistive switching material in tandem with graphene-insulator-semiconductor (GIS) light-emitting diode (LED). By utilizing the excellent properties of graphene, such as high conductivity, high robustness and high transparency, our proposed LEM enables data communication via electronic and optical signals simultaneously. Both the bistable light-emission state and the resistance switching properties can be attributed to the conducting filament mechanism. Moreover, on the analysis of current-voltage characteristics, we further confirm that the electroluminescence signal originates from the carrier tunneling, which is quite different from the standard p-n junction model. We stress here that the newly developed LEM device possesses a simple structure with mature fabrication processes, which integrates advantages of all composed materials and can be extended to many other material systems. It should be able to attract academic interest as well as stimulate industrial application.
ISSN:2045-2322
2045-2322
DOI:10.1038/srep05121