DataVXACS Applied Materials & InterfacesPaper
journal article·2019-01-09

Energy Band Gap Modulation in Nd-Doped BiFeO3/SrRuO3 Heteroepitaxy for Visible Light Photoelectrochemical Activity

Kok Hong Tan, Yun-Wen Chen, Chien Nguyen Van, Hongliang Wang, Jhih-Wei Chen, Fang Sheng Lim, Khian-Hooi Chew, Qian Zhan, Chung-Lin Wu, Siang-Piao Chai, Ying-Hao Chu, Wei Sea Chang

ACS Applied Materials & Interfaces· Volume 11· Issue 1
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Source abstract

Abstract

The ability of band offsets at multiferroic/metal and multiferroic/electrolyte interfaces in controlling charge transfer and thus altering the photoactivity performance has sparked significant attention in solar energy conversion applications. Here, we demonstrate that the band offsets of the two interfaces play the key role in determining charge transport direction in a downward self-polarized BFO film. Electrons tend to move to BFO/electrolyte interface for water reduction. Our experimental and first-principle calculations reveal that the presence of neodymium (Nd) dopants in BFO enhances the photoelectrochemical performance by reduction of the local electron-hole pair recombination sites and modulation of the band gap to improve the visible light absorption. This opens a promising route to the heterostructure design by modulating the band gap to promote efficient charge transfer.
Source: openalex_inverted_index · Quality: baseline

Research context

Energy storage

OpenAlex topics: Multiferroics and related materials · Advanced Photocatalysis Techniques · Transition Metal Oxide Nanomaterials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 10617, Taiwan

Department of Materials Science and Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan

School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China

Department of Physics, National Cheng Kung University, Tainan 70101, Taiwan

Center for Theoretical Physics, Department of Physics, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia

Department of Mechanical Engineering, Ming Chi University of Technology, New Taipei City 24301, Taiwan

Funding

Monash University · Ministry of Higher Education, Malaysia · United Nations Educational, Scientific and Cultural Organization · Universiti Malaya · The World Academy of Sciences

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