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Subject: search.filters.subject.bistable device

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    Electrical Bistable Properties of P-25 TiO2 Nanoparticles Composited with PVP for Memory Devices
    (2019-10-01)
    Ukakimaparn, P.
    ;
    Chantarawong, D.
    ;
    Songkeaw, P.
    ;
    Onlaor, K.
    ;
    Thiwawong, T.
    In this work, P-25 titanium dioxide nanoparticles (TiO<inf>2</inf> NPs) were composited with poly-vinylpyrrolidone (PVP) at various concentrations of TiO<inf>2</inf> NPs. The bistable memory devices were fabricated by spin coating from a prepared PVP:TiO<inf>2</inf> NPs solution on indium tin oxide (ITO) electrodes with the device structure of ITO/PVP:TiO<inf>2</inf> NPs/Al. The maximum ON/OFF current ratio of the bistable memory devices was approximately 10<sup>5</sup> at a reading voltage of +1 V. The mechanism of the memory device can be expressed by theoretical fitting between the experimental results and conduction models. Moreover, a retention time test for continuous read operations of the device is presented.
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    Electrical bistable properties of ZnO nanoparticles thin film prepared by electrostatic spray deposition technique
    (2015-07-01)
    Chaithanatkun, Natpasit
    ;
    Chantarawong, Direklit
    ;
    Songkeaw, Potiyan
    ;
    Onlaor, Korakot
    ;
    Thiwawong, Thutiyaporn
    Thin films of zinc oxide nanoparticles (ZnO NPs) for bistable device was prepared by electrostatic spray deposition technique based on an indium-tin oxide/ZnO NPs/aluminum (ITO/ZnO NPs /Al) structure. The characterizations of ZnO NPs films were performed using X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM). The influence of the deposition time on properties of films was also investigated. Moreover, the effect of deposition time on the bistable properties can be performed by current-voltage (I-V) measurements. The conduction mechanism of the bistable device was analyzed by theoretical model.