title: Nonvolatile flexible organic bistable devices fabricated utilizing CdSe/ZnS nanoparticles embedded in a conducting poly N-vinylcarbazole polymer layer.
abstract: The bistable effects of CdSe/ZnS nanoparticles embedded in a conducting poly N-vinylcarbazole (PVK) polymer layer by using flexible poly-vinylidene difluoride (PVDF) and polyethylene terephthalate (PET) substrates were investigated. Transmission electron microscopy (TEM) images revealed that CdSe/ZnS nanoparticles were formed inside the PVK polymer layer. Current-voltage (I-V) measurement on the Al/[CdSe/ZnS nanoparticles+ PVK]/ITO/PVDF and Al/[CdSe/ZnS nanoparticles+ PVK ]/ITO/PET structures at 300 K showed a nonvolatile electrical bistability behavior with a flat-band voltage shift due to the existence of the CdSe/ZnS nanoparticles, indicative of trapping, storing and emission of charges in the electronic states of the CdSe nanoparticles. A bistable behavior for the fabricated organic bistable device (OBD) structures is described on the basis of the I-V results. These results indicate that OBDs fabricated by embedding inorganic CdSe/ZnS nanoparticles in a conducting polymer matrix on flexible substrates are prospects for potential applications in flexible nonvolatile flash memory devices.
authors.affiliation: Korea Institute of Science and Technology, Materials Science and Technology Research Division, Cheongryang, PO Box 131, Seoul 130-650, Korea. Department of Information Display, Division of Electronics and Computer Engineering, Hanyang University, 17 Haengdang-dong, Seongdong-gu, Seoul 133-791, Korea.
authors.forename: Dong-Ick
authors.initials: DI
authors.lastname: Son
authors.forename: Ji-Hwan
authors.initials: JH
authors.lastname: Kim
authors.forename: Dong-Hee
authors.initials: DH
authors.lastname: Park
authors.forename: Won Kook
authors.initials: WK
authors.lastname: Choi
authors.forename: Fushan
authors.initials: F
authors.lastname: Li
authors.forename: Jung Hun
authors.initials: JH
authors.lastname: Ham
authors.forename: Tae Whan
authors.initials: TW
authors.lastname: Kim