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Flexible organic bistable devices based on graphene embedded in an insulating poly(methyl methacrylate) polymer layer

Nano Letters, ISSN: 1530-6984, Vol: 10, Issue: 7, Page: 2441-2447
2010
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Article Description

The electrical properties of flexible nonvolatile organic bistable devices (OBDs) fabricated with graphene sandwiched between two insulating poly(methyl methacrylate) (PMMA) polymer layers were investigated. Current-voltage (I-V) measurements on the Al/PMMA/graphene/PMMA/indium-tin-oxide/poly(ethylene terephthalate) devices at 300 K showed a current bistability due to the existence of the graphene, indicative of charge storage in the graphene. The maximum ON/OFF ratio of the current bistability for the fabricated OBDs was as large as 1 × 10, and the endurance number of ON/OFF switchings was 1.5 × 10 cycles, and an ON/OFF ratio of 4.4 × 10 was maintained for retention times larger than 1 × 10 s. No interference effect was observed for the scaled-down OBDs containing a graphene layer. The memory characteristics of the OBDs maintained similar device efficiencies after bending and were stable during repetitive bendings of the OBDs. The mechanisms for these characteristics of the fabricated OBDs are described on the basis of the I-V results. © 2010 American Chemical Society.

Bibliographic Details

Son, Dong Ick; Kim, Tae Whan; Shim, Jae Ho; Jung, Jae Hun; Lee, Dea Uk; Lee, Jung Min; Park, Won Il; Choi, Won Kook

American Chemical Society (ACS)

Chemical Engineering; Chemistry; Materials Science; Physics and Astronomy; Engineering

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