Anomalous photovoltaic effect in Bi(Ni2/3Ta1/3)O3‐PbTiO3 ferroelectric solid solutions

Dense Bi(Ni2/3Ta1/3)O3‐PbTiO3 (BNT‐PT) ceramics were prepared by solid‐state reaction method. Morphotropic phase boundary between tetragonal and rhombohedral phase was observed around the composition 0.38BNT‐0.62PT, at which large photovoltages of 13.2V were obtained under 405 nm laser illumination...

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Bibliographic Details
Published in:Journal of the American Ceramic Society 2019-06, Vol.102 (6), p.3448-3456
Main Authors: Pang, Dongfang, Liu, Xitao, He, Xiang, Chen, Chen, Zheng, Jing, Yi, Zhiguo
Format: Article
Language:English
Subjects:
ferroelectric
Ferroelectric materials
Ferroelectricity
Lead titanates
Light
MPB
PbTiO3
Photovoltages
Photovoltaic
Photovoltaic effect
Solid solutions
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Summary:Dense Bi(Ni2/3Ta1/3)O3‐PbTiO3 (BNT‐PT) ceramics were prepared by solid‐state reaction method. Morphotropic phase boundary between tetragonal and rhombohedral phase was observed around the composition 0.38BNT‐0.62PT, at which large photovoltages of 13.2V were obtained under 405 nm laser illumination with power density of 200 mW/cm2. By B‐site Ni2+ ions doping, the bandgap values of BNT‐PT solid solutions were reduced to 2.25~1.85 eV, and the anomalous photovoltaic response was extended from the ultraviolet region to a wavelength of 550 nm at the visible light region.
ISSN:0002-7820
1551-2916
DOI:10.1111/jace.16184