Ferroelectric, Photoelectric, and Photovoltaic Performance of Silver Niobate Ceramics

doi:10.1002/adfm.201900918

	Ferroelectric, Photoelectric, and Photovoltaic Performance of Silver Niobate Ceramics
	He, Xiang; Chen, Chen; Li, Chunbo; Zeng, Huarong; Yi, Zhiguo
刊名	ADVANCED FUNCTIONAL MATERIALS
	2019-07-01
卷号	29 期号:28
关键词	anomalous photovoltaic effect ferroelectrics photoelectric silver niobate
ISSN号	1616-301X
DOI	10.1002/adfm.201900918
文献子类	Article
英文摘要	Ferroelectrics coupled with solar energy conversion are receiving intensive research interest. However, most ferroelectrics with a large remnant polarization can only harvest ultraviolet light in the solar spectrum. Herein, high-quality silver niobate (AgNbO3) ceramics prepared by spark plasma sintering is reported with a bandgap of approximate to 2.75 eV and a long tail absorption until 800 nm, leading to outstanding photoelectric properties featured by the visible-light response over 550 nm. Instantaneous photoresponse measurement using a 355 nm nanosecond pulse laser shows a fast response speed in nanoseconds. Moreover, the ceramic exhibits an intriguing photovoltaic effect under either electric poling or mechanical polishing. Both approaches have switchable characteristics and produce a stable photovoltage as well as photocurrent, while temperature dependence behavior reveals distinctions between ferroelectric polarization and ferroelastic strains in determining the photovoltaic properties. Piezoelectric force microscopy characterization further confirms distinctions between the underlying mechanisms. The electric poling induced photovoltaic effect stems from the aligned polarization involving the ferroelectric component, whereas the mechanical polishing induced photovoltaic effect is associated with the flexoelectricity induced by strain gradients. These results not only show AgNbO3 to be a promising material for photoelectric application but also deepen the understanding of the mechanism underlying ferroelectric photovoltaics.
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
语种	英语
出版者	WILEY-V C H VERLAG GMBH
内容类型	期刊论文
源URL	[http://ir.sic.ac.cn/handle/331005/26995]
专题	中国科学院上海硅酸盐研究所
推荐引用方式 GB/T 7714	He, Xiang,Chen, Chen,Li, Chunbo,et al. Ferroelectric, Photoelectric, and Photovoltaic Performance of Silver Niobate Ceramics[J]. ADVANCED FUNCTIONAL MATERIALS,2019,29(28).
APA	He, Xiang,Chen, Chen,Li, Chunbo,Zeng, Huarong,&Yi, Zhiguo.(2019).Ferroelectric, Photoelectric, and Photovoltaic Performance of Silver Niobate Ceramics.ADVANCED FUNCTIONAL MATERIALS,29(28).
MLA	He, Xiang,et al."Ferroelectric, Photoelectric, and Photovoltaic Performance of Silver Niobate Ceramics".ADVANCED FUNCTIONAL MATERIALS 29.28(2019).