Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7836387 | Applied Surface Science | 2018 | 18 Pages |
Abstract
Organic bistable devices (OBDs) with exfoliated mica nanoparticles (NPs) embedded into an insulating poly(methylmethacrylate) (PMMA) layer were fabricated by using a spin-coating method. Current-voltage (I-V) curves for the Al/PMMA/exfoliated mica NP/PMMA/indium-tin-oxide/glass devices at 300Â K showed a clockwise current hysteresis behavior due to the existence of the exfoliated muscovite-type mica NPs, which is an essential feature for bistable devices. Write-read-erase-read data showed that the OBDs had rewritable nonvolatile memories and an endurance number of ON/OFF switching for the OBDs of 102 cycles. An ON/OFF ratio of 1Â ÃÂ 103 was maintained for retention times larger than 1Â ÃÂ 104Â s. The memory mechanisms of the fabricated OBDs were described by using the trapping and the tunneling processes within a PMMA active layer containing exfoliated muscovite-type mica NPs on the basis of the energy band diagram and the I-V curves.
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Authors
Won Gyu Lim, Dea Uk Lee, Han Gil Na, Hyoun Woo Kim, Tae Whan Kim,