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Non-Stoichiometry Induced Switching Behavior of Ferroelectric Photovoltaic Effect in BaTiO3 Ceramics
Xiang, Hao; Zhang, Faqiang; Yi, Zhiguo; Ma, Mingsheng; Gu, Yan; Liu, Feng; Li, Yongxiang; Liu, Zhifu
2019-07-01
Source PublicationPHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS
ISSN1862-6254
Volume13Issue:7
SubtypeArticle
AbstractFerroelectric photovoltaic (FPV) effect has been studied among a series of non-stoichiometric BaTiO3 (Ba/Ti = 0.92-1.05) ceramic chips prepared by tape casting method. The FPV performance increases abruptly when the Ba/Ti molar ratio deviates from the stoichiometry within 1%. Meanwhile, a photocurrent direction switching behavior is observed between Ti-excess and Ba-excess samples. The TEM analysis shows their significant difference in grain-boundary (GB), where abnormal GB with a width of 10-15 nm is observed in Ba-excess sample. The photocurrent switching phenomenon is described to the competition between the asymmetrical Schottky barriers induced PV effect and intrinsic FPV effect. Widen GB in Ba-excess BaTiO3 ceramics restrains the intrinsic FPV effect and results in the switching behavior. This study offers direct evidence of the vital role of GB in FPV effect and may promote the development of photovoltaic devices.
Keywordbarium titanate ferroelectric photovoltaic non-stoichiometry switching behavior
DOI10.1002/pssr.201900074
Language英语
WOS Research AreaMaterials Science ; Physics
PublisherWILEY-V C H VERLAG GMBH
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/27002
Collection中国科学院上海硅酸盐研究所
Recommended Citation
GB/T 7714
Xiang, Hao,Zhang, Faqiang,Yi, Zhiguo,et al. Non-Stoichiometry Induced Switching Behavior of Ferroelectric Photovoltaic Effect in BaTiO3 Ceramics[J]. PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS,2019,13(7).
APA Xiang, Hao.,Zhang, Faqiang.,Yi, Zhiguo.,Ma, Mingsheng.,Gu, Yan.,...&Liu, Zhifu.(2019).Non-Stoichiometry Induced Switching Behavior of Ferroelectric Photovoltaic Effect in BaTiO3 Ceramics.PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS,13(7).
MLA Xiang, Hao,et al."Non-Stoichiometry Induced Switching Behavior of Ferroelectric Photovoltaic Effect in BaTiO3 Ceramics".PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS 13.7(2019).
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