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Sci Rep. 2014 Apr 9;4:4614. doi: 10.1038/srep04614.

Transparent multi-level resistive switching phenomena observed in ITO/RGO/ITO memory cells by the sol-gel dip-coating method.

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  • 1School of Electrical Engineering, Korea University, Anam-dong 5-ga, Sungbuk-gu, Seoul 136-701, Republic of Korea.


A reduced graphene oxide (RGO)-based transparent electronic memory cell with multi-level resistive switching (RS) was successfully realized by a dip-coating method. Using ITO/RGO/ITO structures, the memory device exhibited a transmittance above 80% (including the substrate) in the visible region and multi-level RS behavior in the 00, 01, 10, and 11 states by varying the pulse height from 2 V to 7 V. In the reliability test, the device exhibited a good endurance of over 10(5) cycles and a long data retention of over 10(5) s at 85°C in each state. We believe that the RGO-based transparent memory presented in this work could be a milestone for future transparent electronic devices.

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