Photoconducting properties in oxygen-deficient Bi4Ti 3O12

Masaru Tada, Minoru Osada, Masato Kakihana, Yuji Noguchi, Masaru Miyayama

    Research output: Contribution to journalArticlepeer-review

    1 Citation (Scopus)


    We investigated the influence of photoexcited nonequilibrium electrons in Bi4Ti3O12 which contains a high density of oxygen vacancies. As increasing oxygen deficiency, the photocurrent undergoes a rapid enhancement, accompanied by a remarkable change of kinetics. In heavily oxygen deficient Bi4Ti3O12-d (d=0.45), we observed dispersive photoconductivity, a behavior resembles with persistent photoconductivity phenomena in some perovskites. We argue that oxygen vacancies acting as trapping centers for electrons are linked to dispersive diffusion in the perovskite blocks, which control carrier recombination.

    Original languageEnglish
    Pages (from-to)7-10
    Number of pages4
    JournalKey Engineering Materials
    Publication statusPublished - 2006 Jan 1


    • BiTiO Photoconductivity
    • Oxygen deficiency
    • Persistent photoconductivity

    ASJC Scopus subject areas

    • Materials Science(all)
    • Mechanics of Materials
    • Mechanical Engineering


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