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Enhanced Photovoltaic Effect in Fe‐Doped (Bi, Na) TiO 3 ‐BaTiO 3 Ferroelectric Ceramics
Author(s) -
Chen Lu,
Lin Qianru,
Hart Judy,
Li Sean,
Wang Danyang
Publication year - 2016
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.12562
Subject(s) - materials science , dopant , doping , band gap , ceramic , photovoltaic system , ferroelectricity , anomalous photovoltaic effect , photovoltaic effect , density functional theory , optoelectronics , dielectric , composite material , computational chemistry , ecology , biology , chemistry
In this study, the photovoltaic ( PV ) effect in Fe‐doped (Bi 0.5 Na 0.5 )TiO 3 ‐0.06BaTiO 3 ( BNBT ) ceramics was investigated. It was found that the bandgap of BNBT is successfully narrowed through Fe doping and a substantially enhanced photovoltaic response was obtained in Fe‐doped BNBT . Density functional theory calculations show that the enhanced PV response can be attributed to the dopant, which introduces localized intermediate states within the band gap as well as a strong asymmetry of the projections of the responsible Fe‐Ti bond length on the c‐axis.