Flexible organic Bistable Devices Based on Graphene Embedded in an Insualting poly(methyl methacrylate) polymer Layer
- Flexible organic Bistable Devices Based on Graphene Embedded in an Insualting poly(methyl methacrylate) polymer Layer
- 손동익; 김태환; 심재호; 정재훈; 이대욱; 이정민; 박원일; 최원국
- flexible; organic bistable device; graphene; polymer; memory characteristic
- Issue Date
- Nano letters
- VOL 10, 2441-2447
- 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 × 107, and the endurance number of ON/OFF switchings was 1.5 × 105 cycles, and an
ON/OFF ratio of 4.4 × 106 was maintained for retention times larger than 1 × 105 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.
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