Resistive switching characteristics of tantalum oxide thin film and titanium oxide nanoparticles hybrid structure

Mi Ra Park, Yawar Abbas, Quanli Hu, Tae Sik Yoon, Young Jin Choi, Chi Jung Kang

    Research output: Contribution to journalArticlepeer-review

    5 Scopus citations

    Abstract

    The fabrication of hybrid structure with TiO2 nanoparticle assembly and Ta2O5 thin film layer was demonstrated. The close-packed nanoparticles could influence the resistive switching behaviors due to the huge numbers of interface states and vacancies in the nanoparticle assembly. The device with hybrid structure presented the typical bipolar resistive switching characteristics in the structure of Ti/TiO2/Ta2O5/Au on SiO2/Si substrate. The set voltage was observed at ∼0.7 V, and the reset voltage occurred at ∼-0.7 V, which was smaller than that of Ta2O5 layer only. The electrical conduction mechanisms were the ohmic conduction at low resistance state (LRS) and the space charge limited conduction at high resistance state (HRS), respectively. The devices showed stable current ratio of LRS to HRS. The temperature dependent properties of the devices were also investigated. The device with nanoparticle assembly showed better electrical characteristics with low HRS current level and stable LRS current level with respect to the temperature.

    Original languageBritish English
    Pages (from-to)8613-8616
    Number of pages4
    JournalJournal of Nanoscience and Nanotechnology
    Volume15
    Issue number11
    DOIs
    StatePublished - 1 Nov 2015

    Keywords

    • Hybrid structure
    • Nanoparticle
    • Resistive switching

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