Photoconducting properties in oxygen-deficient Bi4Ti 3O12

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

doi:10.4028/0-87849-982-2.7

Photoconducting properties in oxygen-deficient Bi₄Ti ₃O₁₂

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

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

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 Bi₄Ti₃O_12-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 language	English
Pages (from-to)	7-10
Number of pages	4
Journal	Key Engineering Materials
Volume	301
DOIs	https://doi.org/10.4028/0-87849-982-2.7
Publication status	Published - 2006
Externally published	Yes

Keywords

BiTiO Photoconductivity
Oxygen deficiency
Persistent photoconductivity

ASJC Scopus subject areas

Ceramics and Composites
Chemical Engineering (miscellaneous)

Access to Document

10.4028/0-87849-982-2.7

Cite this

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title = "Photoconducting properties in oxygen-deficient Bi4Ti 3O12",

abstract = "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.",

keywords = "BiTiO Photoconductivity, Oxygen deficiency, Persistent photoconductivity",

author = "Masaru Tada and Minoru Osada and Masato Kakihana and Yuji Noguchi and Masaru Miyayama",

year = "2006",

doi = "10.4028/0-87849-982-2.7",

language = "English",

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T1 - Photoconducting properties in oxygen-deficient Bi4Ti 3O12

AU - Tada, Masaru

AU - Osada, Minoru

AU - Kakihana, Masato

AU - Noguchi, Yuji

AU - Miyayama, Masaru

PY - 2006

Y1 - 2006

N2 - 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.

AB - 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.

KW - BiTiO Photoconductivity

KW - Oxygen deficiency

KW - Persistent photoconductivity

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