Polarization Alignment in Polycrystalline BiFeO<sub>3</sub> Photoelectrodes for Tunable Band Bending

doi:10.1021/acsnano.3c08081

IMR OpenIR

	Polarization Alignment in Polycrystalline BiFeO₃ Photoelectrodes for Tunable Band Bending
	Li, Xianlong 1; Wang, Zhiliang 1; Ji, Wenzhong 2; Lu, Teng 2; You, Jiakang 1; Wang, Kai 1,3; Liu, Gang 4,5; Liu, Yun 2; Wang, Lianzhou 1
通讯作者	Wang, Zhiliang(zhiliang.wang@uq.edu.au) ; Wang, Lianzhou(l.wang@uq.edu.au)
	2023-11-10
发表期刊	ACS NANO
ISSN	1936-0851
卷号	17 期号:22 页码:22944-22951
摘要	Polarization in a semiconductor can modulate the band bending via the depolarization electric field (E-dP), subsequently tuning the charge separation and transfer (CST) process in photoelectrodes. However, the random orientation of dipole moments in many polycrystalline semiconductor photoelectrodes leads to negligible polarization effect. How to effectively align the dipole moments in polycrystalline photoelectrodes into the same direction to maximize the polarization is still to be developed. Herein, we report that the dipole moments in a ferroelectric BiFeO3 photoelectrode can be controlled under external poling, resulting in a tunable CST efficiency. A negative bias of -40 voltage (V) poling to the photoelectrode leads to an over 110% increase of the CST efficiency, while poling at +40 V, the CST efficiency is reduced to only 41% of the original value. Furthermore, a nearly linear relationship between the external poling voltage and surface potential is discovered. The findings here provide an effective method in tuning the band bending and charge transfer of the emerging ferroelectricity driven solar energy conversion.
关键词	ferroelectricity band bending external poling semiconductor charge separationand transfer
资助者	Australian Research Council ; Australian Research Council through its DECRA ; Laureate Fellowship ; AINSE Ltd. ; Early Career Researcher Grant (ECRG) ; NSFC ; National Key R & D Program of China ; UQ Graduate School
DOI	10.1021/acsnano.3c08081
收录类别	SCI
语种	英语
资助项目	Australian Research Council[DE210100930] ; Australian Research Council[DP200101900] ; Australian Research Council[DP200100159] ; Australian Research Council[DP230100462] ; Australian Research Council through its DECRA[FL190100139] ; Australian Research Council through its DECRA[FL210100017] ; Laureate Fellowship ; AINSE Ltd. ; Early Career Researcher Grant (ECRG)[52120105003] ; NSFC[2021YFA1500800] ; National Key R & D Program of China ; UQ Graduate School
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science
WOS类目	Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS记录号	WOS:001110572100001
出版者	AMER CHEMICAL SOC
引用统计	被引频次：13[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/177392
专题	中国科学院金属研究所
通讯作者	Wang, Zhiliang; Wang, Lianzhou
作者单位	1.Univ Queensland, Australian Inst Bioengn & Nanotechnol, Sch Chem Engn, Nanomat Ctr, St Lucia, Qld 4072, Australia 2.Australian Natl Univ, Res Sch Chem, Canberra, ACT 2601, Australia 3.Curtin Univ, WA Sch Mines Minerals Energy & Chem Engn, Perth, WA 6102, Australia 4.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 5.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Li, Xianlong,Wang, Zhiliang,Ji, Wenzhong,et al. Polarization Alignment in Polycrystalline BiFeO₃ Photoelectrodes for Tunable Band Bending[J]. ACS NANO,2023,17(22):22944-22951.
APA	Li, Xianlong.,Wang, Zhiliang.,Ji, Wenzhong.,Lu, Teng.,You, Jiakang.,...&Wang, Lianzhou.(2023).Polarization Alignment in Polycrystalline BiFeO₃ Photoelectrodes for Tunable Band Bending.ACS NANO,17(22),22944-22951.
MLA	Li, Xianlong,et al."Polarization Alignment in Polycrystalline BiFeO₃ Photoelectrodes for Tunable Band Bending".ACS NANO 17.22(2023):22944-22951.