Energy Band Gap Modulation in Nd-Doped BiFeO 3 /SrRuO 3 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

研究成果: Article同行評審

7 引文 斯高帕斯(Scopus)

摘要

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.

原文English
頁(從 - 到)1655-1664
頁數10
期刊ACS Applied Materials and Interfaces
11
發行號1
DOIs
出版狀態Published - 2019 一月 9

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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