Saini, Pooja and Singh, Manjri and Thakur, Jyoti and Patil, Ranjit and Ma, Yuan Ron and Tandon, Ram P. and Singh, Surinder P. and Mahapatro, Ajit K. (2018) Probing the Mechanism for Bipolar Resistive Switching in Annealed Graphene Oxide Thin Films. ACS Applied Materials and Interfaces, 10 (7). pp. 6521-6530. ISSN 1944-8244

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The bipolar resistive switching (BRS) between a metallic low resistance state (LRS) and an insulating high resistance state (HRS) is demonstrated for annealed graphene oxide (GO) thin film-based device structures with aluminum (Al) as one of the contact electrodes. An optimal switching of similar to 10(4) order is recorded for Al/GO (200 degrees C)/indium tin oxide (ITO) among the device structures in metal (M-2)/GO (T)/metal (M-1) configurations (M-1 = Al, Au, or ITO and M-2 = Au or Al), fabricated using GO (T)/metal (M-1), annealed at different temperatures, T = 100, 200, 300, and 400 degrees C. The initial Ohmic conduction for electronic transport and the presence of metal contents through GO thin films in the X-ray photoelectron spectroscopy support the physical evidence of Al filament formation between the two electrodes as imaged by the high-resolution transmission electron microscopy. The speculated mechanism for BRS in repeated voltage sweep cycles is attributed to the current triggered breaking of metal filaments because of the combined effect of Joules heating and Peltier heat generation at LRS -> HRS transition, and electric field induced migration of metal atoms, leading to the formation of metal filaments through the GO film at the HRS up arrow LRS transition. The higher switching ratio exhibited in the current study could be translated to engineer simple and low-cost resistive memory devices.

Item Type: Article
Additional Information: Copyright for this article belongs to M/s American Chemical Society.
Subjects: Materials Science
Nanoscience/ Nanotechnology
Depositing User: Users 27 not found.
Date Deposited: 20 Dec 2019 06:37
Last Modified: 20 Dec 2019 06:37

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