Field-induced Strain Property of Lead-free Ferroelectric Ceramics Based on Sodium Bismuth Titanate

Yang, Haitao; Xuefan, Zhou; Haojie, Fang; Zhang, Xiaoyun; Hang, Luo; Zhang, Dou

doi:10.15541/jim20210453

Cited by 2 publications

(1 citation statement)

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“…The lack of body‐inversion symmetry is typical of ferroelectric oxides, enabling their potential application in various fields, such as dielectric capacitors, 1–3 photodetectors, 4,5 piezoelectric sensors, 6–9 and photocatalysts 10,11 . Ferroelectric photovoltaic materials, which can generate photovoltages above the bandgap and efficiently separate photogenerated carriers, are attracting considerable research attention as potential candidates for new photovoltaic devices 12,13 .…”

Section: Introductionmentioning

confidence: 99%

Microstructures and photovoltaic effect of KNbO₃–SrCo_0.5Hf_0.5O₃₋_δ ferroelectric semiconductors

Deng

et al. 2023

J Am Ceram Soc.

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Polarization is one of the unique properties of ferroelectric materials; yet the polarization mechanism for enhancing ferroelectric photovoltaic performance is rarely been investigated, particularly in terms of bandgap variation. In this work, the effect of high-field polarization on the enhanced photovoltaic performance of a ferroelectric ceramic, 0.98KNbO 3 -0.02SrCo 0.5 Hf 0.5 O 3−δ (KNSCH2), was explored in terms of bandgap variation. The bandgap of the KNSCH2 sample shrank after polarization because of the increase in potential energy band overlap and the upward shift of the valence band due to increased oxygen-vacancy defects. The polarization optimized the energy band structure of KNSCH2, promoting the separation and transport of photoinduced carriers and thus further enhancing its photovoltaic performance. The KNSCH2 sample shows a twofold enhancement in J sc after 60 kV/cm polarization. The degree of the lattice distortion of KNSNH2 increased following polarization, causing a minute increase in its cell asymmetry. The reasons for the bandgap narrowing and the creation of sub-bandgaps in the KNSCH samples were also investigated. This work opened new doors to understanding the mechanisms underlying the polarization-enhanced photovoltaic performance of ferroelectric materials.

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Section: Introductionmentioning

confidence: 99%

Microstructures and photovoltaic effect of KNbO₃–SrCo_0.5Hf_0.5O₃₋_δ ferroelectric semiconductors

Deng

et al. 2023

J Am Ceram Soc.

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Characterization of High Temperature Resistivity and Full Matrix Material Coefficient of LGT Crystals

Su¹,

Li²,

Xiong³

et al. 2023

Journal of Inorganic Materials

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Field-induced Strain Property of Lead-free Ferroelectric Ceramics Based on Sodium Bismuth Titanate

Cited by 2 publications

References 25 publications

Microstructures and photovoltaic effect of KNbO₃–SrCo_0.5Hf_0.5O₃₋_δ ferroelectric semiconductors

Microstructures and photovoltaic effect of KNbO₃–SrCo_0.5Hf_0.5O₃₋_δ ferroelectric semiconductors

Characterization of High Temperature Resistivity and Full Matrix Material Coefficient of LGT Crystals

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Field-induced Strain Property of Lead-free Ferroelectric Ceramics Based on Sodium Bismuth Titanate

Cited by 2 publications

References 25 publications

Microstructures and photovoltaic effect of KNbO3–SrCo0.5Hf0.5O3−δ ferroelectric semiconductors

Microstructures and photovoltaic effect of KNbO3–SrCo0.5Hf0.5O3−δ ferroelectric semiconductors

Characterization of High Temperature Resistivity and Full Matrix Material Coefficient of LGT Crystals

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Microstructures and photovoltaic effect of KNbO₃–SrCo_0.5Hf_0.5O₃₋_δ ferroelectric semiconductors

Microstructures and photovoltaic effect of KNbO₃–SrCo_0.5Hf_0.5O₃₋_δ ferroelectric semiconductors