Enhancement of photovoltaic properties with Nb modified (Bi, Na) TiO3–BaTiO3 ferroelectric ceramics

In this study, the photovoltaic properties of Nb doped (Bi0.5Na0.5) TiO3–xBaTiO3 (BNBT) ferroelectric ceramics prepared by spark plasma sintering (SPS) were investigated and compared with the conventionally sintered (CS) samples. Much higher photocurrent and photovoltage were observed in SPS samples...

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Bibliographic Details
Published in:Journal of alloys and compounds 2014-02, Vol.587, p.339-343
Main Authors: Chen, L., Luo, B.C., Chan, N.Y., Dai, J.Y., Hoffman, M., Li, S., Wang, D.Y.
Format: Article
Language:English
Subjects:
BNBT
Ceramics
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Doping
Electronic transport in condensed matter
Exact sciences and technology
Ferroelectric materials
Ferroelectrics
Niobium
Photoconduction and photovoltaic effects
photodielectric effects
Photovoltages
Photovoltaic
Photovoltaic cells
Physics
Solar cells
Spark plasma sintering
SPS
Titanium dioxide
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Summary:In this study, the photovoltaic properties of Nb doped (Bi0.5Na0.5) TiO3–xBaTiO3 (BNBT) ferroelectric ceramics prepared by spark plasma sintering (SPS) were investigated and compared with the conventionally sintered (CS) samples. Much higher photocurrent and photovoltage were observed in SPS samples due to their more compact and homogenous microstructures with smaller grain size. Nb doping increases the photovoltaic response of SPS BNBT ceramics significantly. Optimal photovoltaic response is obtained for 1at.% Nb doped SPS BNBT ceramics with a large above-bandgap photovoltage, showing the potential in future photovoltaic application.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2013.10.207