Abstract
We report here the use of facile and environmentally benign way synthesized reduced graphene oxide (RGO) for low-voltage non-volatile memory device as charge storing element. The RGO solutions have been synthesized using electrochemical exfoliation of battery electrode. The solution processed based RGO solution is suitable for large area and low-cost processing on plastic substrate. Room-temperature current–voltage characterisation has been carried out in Ag/RGO/ITO PET sandwich configuration to study the type of trap distribution. It is observed that in the low-voltage sweep, ohmic current is the main mechanism of current flow and trap filled/assisted conduction is observed at high-sweep voltage region. The Ag/RGO/ITO PET sandwich structure showed bipolar resistive switching behavior. These mechanisms can be analyzed based on oxygen availability and vacancies in the RGO giving rise to continuous least resistive path (conductive) and high resistance path along the structure. An Ag/RGO/ITO arrangement demonstrates long retention time with low operating voltage, low set/reset voltage, good ON/OFF ratio of 103 (switching transition between lower resistance state and higher resistance state and decent switching performance. The RGO memory showed decent results with an almost negligible degradation in switching properties which can be used for low-voltage and low-cost advanced flexible electronics.
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Acknowledgements
This research work is supported by Vision Group of Science and Technology (VGST), No. VGST/SMYSR (2014-15)/GRD-448/2015-16 from Govt. of Karnataka, India. The authors would like to thank Manipal Academy of Higher Education (MAHE), Manipal, for facilitating the infrastructures of characterization facility.
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Vartak, R., Rag, A., De, S. et al. Study of Ag/RGO/ITO sandwich structure for resistive switching behavior deposited on plastic substrate. Appl Nanosci 8, 1343–1351 (2018). https://doi.org/10.1007/s13204-018-0800-2
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DOI: https://doi.org/10.1007/s13204-018-0800-2