TY - JOUR
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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U2 - 10.4028/0-87849-982-2.7
DO - 10.4028/0-87849-982-2.7
M3 - Article
AN - SCOPUS:33644857381
VL - 301
SP - 7
EP - 10
JO - Key Engineering Materials
JF - Key Engineering Materials
SN - 1013-9826
ER -