Dong-Ick Son et al 2009 Nanotechnology 20 195203 doi:10.1088/0957-4484/20/19/195203
Dong-Ick Son1,2, Dong-Hee Park1, Won Kook Choi1,3, Sung-Hwan Cho2, Won-Tae Kim2 and Tae Whan Kim2
Show affiliationsThe bistable effects of ZnO nanoparticles embedded in an insulating poly(methyl methacrylate) (PMMA) polymer single layer by using flexible polyethylene terephthalate (PET) substrates were investigated. Transmission electron microscopy (TEM) images revealed that ZnO nanoparticles were formed inside the PMMA polymer layer. Current–voltage (I–V) measurement on the Al/ZnO nanoparticles embedded in an insulating PMMA polymer layer/ITO/PET structures at 300 K showed a nonvolatile electrical bistability behavior with a flat-band voltage shift due to the existence of the ZnO nanoparticles, indicative of trapping, storing, and emission of charges in the electronic states of the ZnO nanoparticles. The carrier transport mechanism of the bistable behavior for the fabricated organic bistable device (OBD) structures is described on the basis of the I–V results by analyzing the effect of space charge.
85.35.-p Nanoelectronic devices
81.07.-b Nanoscale materials and structures: fabrication and characterization
85.30.De Semiconductor-device characterization, design, and modeling
73.50.Gr Charge carriers: generation, recombination, lifetime, trapping, mean free paths
Issue 19 (13 May 2009)
Received 14 January 2009, in final form 23 February 2009
Published 20 April 2009
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