Fabrication of transparent bistable switching memory device using plasmapolymerized Hexamethyldisiloxane (cas 107-46-0) layers with embedded graphene quantum dots

Add time:08/22/2019    Source:sciencedirect.com

We demonstrated the feasibility to fabricate two-terminal non-volatile-memory (NVM) devices using pulsed radio frequency (rf) plasma polymerization and simple solution route. The two-terminal NVM devices were fabricated based on a metal-insulator-metal structure consisting of graphene quantum dots (GQDs) embedded in Hexamethyldisiloxane (cas 107-46-0) dielectric layers. The charge trapping layer, GQDs and the top contacts were formed by spin coating and spray coating methods. Whereas, the dielectric layers were deposited using pulsed rf plasma polymerization. The current-voltage curves showed a bistable current behavior with the presence of hysteresis window. The fabricated NVM memory devices were reprogrammable when the endurance test was performed and stable up to 1 × 104 s cycles with a distinct ON/OFF ratio of 104. Based on the obtained I-V characteristics, Schottky emission, Poole-Frenkel emission, trapped-charge limited-current and space-charge-limited current were proposed as the dominant conduction mechanisms for the fabricated NVM devices.

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