The origin of enhanced optical absorption of the BiFeO3/ZnO heterojunction in the visible and terahertz regions

doi:10.1039/c5cp04389a

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	The origin of enhanced optical absorption of the BiFeO3/ZnO heterojunction in the visible and terahertz regions
	Feng, Hong-Jian 1,2; Yang, Kang 1,2; Deng, Wan 1,2; Li, Mengmeng 1,2; Wang, Mingzi 1,2; Duan, Bi 1,2; Liu, Feng 3; Tian, Jinshou3 ; Guo, Xiaohui 3
	2015
发表期刊	PHYSICAL CHEMISTRY CHEMICAL PHYSICS
卷号	17 期号:40 页码:26930-26936
摘要	Optical absorption is improved for the BiFeO3/ZnO heterostructure prepared by a sol-gel process, especially, in the terahertz energy region. A dipole-corrected slab model is used to describe the bilayer film, and first-principles calculations agree with the experiments which present unambiguous explanation for the enhancement of the optical properties. Two-dimensional electrons in the ZnO side of the heterostructure are found to play an essential role in forming the photoinduced carriers and the enhancement of the absorption. The conducting layers tend to penetrate into the interface and decrease the band gap, leading to the transport of carriers through the interface to the BiFeO3 side. The photoinduced carriers can be separated by the ferroelectric domains in BiFeO3, and this mechanism makes the heterostructure an ideal candidate for BiFeO3-based ferroelectric photovoltaic cells.
文章类型	Article
WOS标题词	Science & Technology ; Physical Sciences
DOI	10.1039/c5cp04389a
收录类别	SCI
关键词[WOS]	BISMUTH FERRITE ; OXIDE ; ZNO ; HETEROSTRUCTURES ; FILM
语种	英语
WOS研究方向	Chemistry ; Physics
WOS类目	Chemistry, Physical ; Physics, Atomic, Molecular & Chemical
WOS记录号	WOS:000362679300048
引用统计	被引频次：15[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.opt.ac.cn/handle/181661/25503
专题	条纹相机工程中心
作者单位	1.Northwest Univ, Sch Phys, State Key Lab Incubat Base Photoelect Technol & F, Xian 710069, Peoples R China 2.Northwest Univ, Int Collaborat Ctr Photoelect Technol & Nano Func, Xian 710069, Peoples R China 3.Chinese Acad Sci, Xian Inst Opt & Precis Mech, State Key Lab Transient Opt & Photon, Xian 710119, Peoples R China
推荐引用方式 GB/T 7714	Feng, Hong-Jian,Yang, Kang,Deng, Wan,et al. The origin of enhanced optical absorption of the BiFeO3/ZnO heterojunction in the visible and terahertz regions[J]. PHYSICAL CHEMISTRY CHEMICAL PHYSICS,2015,17(40):26930-26936.
APA	Feng, Hong-Jian.,Yang, Kang.,Deng, Wan.,Li, Mengmeng.,Wang, Mingzi.,...&Guo, Xiaohui.(2015).The origin of enhanced optical absorption of the BiFeO3/ZnO heterojunction in the visible and terahertz regions.PHYSICAL CHEMISTRY CHEMICAL PHYSICS,17(40),26930-26936.
MLA	Feng, Hong-Jian,et al."The origin of enhanced optical absorption of the BiFeO3/ZnO heterojunction in the visible and terahertz regions".PHYSICAL CHEMISTRY CHEMICAL PHYSICS 17.40(2015):26930-26936.

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