The effect of polarization fatigue process and light illumination on the transport behavior of Bi0.9La0.1FeO3 sandwiched capacitor

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	The effect of polarization fatigue process and light illumination on the transport behavior of Bi0.9La0.1FeO3 sandwiched capacitor
	Gao, RL ; Chen, YS ; Sun, JR ; Zhao, YG ; Li, JB ; Shen, BG
刊名	JOURNAL OF APPLIED PHYSICS
	2013
卷号	113 期号:18
ISSN号	0021-8979
通讯作者	Gao, RL (reprint author), Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China.
中文摘要	In this paper, Ag/Bi0.9La0.1FeO3 (BLFO)/La0.7Sr0.3MnO3 sandwich structure was grown epitaxially on SrTiO3 substrates using pulsed laser deposition. Short-circuit photocurrent (I-short) and frequency dependence of the capacitance were investigated. It reveals that this heterostructure exhibits strong photocurrent responses, the orientation of I-short depends strongly on the polarization orientations, and it varies monotonically from one orientation to the other as the polarization orientation switching gradually from upward (downward) to downward (upward), the I-short value becomes zero when the film is in zero polarization states. The intensity of the I-short can be strengthened by several times after thousands of bipolar electric pulses. Moreover, after polarization fatigue process of bipolar electric pulses or under light illumination, the capacitance of this sandwich structure is always bigger than the original state. However, the magnifying ratio of the capacitance after and before polarization fatigue process or under light illumination decrease with increasing the frequency in the C-f curves. These results suggest that polarization induced surface charge combined with migration of oxygen vacancies is the primary driving force for the varying of interfacial barriers and the oxygen vacancies density near the interface, which in turn leads to different orientations and values of I-short as well as the differential interfacial capacitance. Our results indicate that the photovoltaic response in ferroelectric BLFO thin films could be further explored for solar light photovoltaic and other capacitor devices applications. (C) 2013 AIP Publishing LLC.
资助信息	National Basic Research of China; National Natural Science Foundation of China; Knowledge Innovation Project of the Chinese Academy of Sciences; Beijing Municipal Natural Science Foundation
语种	英语
公开日期	2014-01-17
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/57567]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Gao, RL,Chen, YS,Sun, JR,et al. The effect of polarization fatigue process and light illumination on the transport behavior of Bi0.9La0.1FeO3 sandwiched capacitor[J]. JOURNAL OF APPLIED PHYSICS,2013,113(18).
APA	Gao, RL,Chen, YS,Sun, JR,Zhao, YG,Li, JB,&Shen, BG.(2013).The effect of polarization fatigue process and light illumination on the transport behavior of Bi0.9La0.1FeO3 sandwiched capacitor.JOURNAL OF APPLIED PHYSICS,113(18).
MLA	Gao, RL,et al."The effect of polarization fatigue process and light illumination on the transport behavior of Bi0.9La0.1FeO3 sandwiched capacitor".JOURNAL OF APPLIED PHYSICS 113.18(2013).