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

Research output: Contribution to journalArticle

1 Citation (Scopus)

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.

Original languageEnglish
Pages (from-to)1655-1664
Number of pages10
JournalACS Applied Materials and Interfaces
Volume11
Issue number1
DOIs
Publication statusPublished - 2019 Jan 9

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Neodymium
Epitaxial growth
Band structure
Charge transfer
Energy gap
Modulation
Electrolytes
Electrons
Energy conversion
Solar energy
Light absorption
Heterojunctions
Metals
Doping (additives)
Water

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

Cite this

Tan, Kok Hong ; Chen, Yun Wen ; Nguyen Van, Chien ; Wang, Hongliang ; Chen, Jhih Wei ; Lim, Fang Sheng ; Chew, Khian Hooi ; Zhan, Qian ; Wu, Chung Lin ; Chai, Siang Piao ; Chu, Ying Hao ; Chang, Wei Sea. / Energy Band Gap Modulation in Nd-Doped BiFeO 3 /SrRuO 3 Heteroepitaxy for Visible Light Photoelectrochemical Activity In: ACS Applied Materials and Interfaces. 2019 ; Vol. 11, No. 1. pp. 1655-1664.
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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.",
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Tan, KH, Chen, YW, Nguyen Van, C, Wang, H, Chen, JW, Lim, FS, Chew, KH, Zhan, Q, Wu, CL, Chai, SP, Chu, YH & Chang, WS 2019, ' Energy Band Gap Modulation in Nd-Doped BiFeO 3 /SrRuO 3 Heteroepitaxy for Visible Light Photoelectrochemical Activity ', ACS Applied Materials and Interfaces, vol. 11, no. 1, pp. 1655-1664. https://doi.org/10.1021/acsami.8b17758

Energy Band Gap Modulation in Nd-Doped BiFeO 3 /SrRuO 3 Heteroepitaxy for Visible Light Photoelectrochemical Activity . / Tan, Kok Hong; Chen, Yun Wen; Nguyen Van, Chien; Wang, Hongliang; Chen, Jhih Wei; Lim, Fang Sheng; Chew, Khian Hooi; Zhan, Qian; Wu, Chung Lin; Chai, Siang Piao; Chu, Ying Hao; Chang, Wei Sea.

In: ACS Applied Materials and Interfaces, Vol. 11, No. 1, 09.01.2019, p. 1655-1664.

Research output: Contribution to journalArticle

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T1 - Energy Band Gap Modulation in Nd-Doped BiFeO 3 /SrRuO 3 Heteroepitaxy for Visible Light Photoelectrochemical Activity

AU - Tan, Kok Hong

AU - Chen, Yun Wen

AU - Nguyen Van, Chien

AU - Wang, Hongliang

AU - Chen, Jhih Wei

AU - Lim, Fang Sheng

AU - Chew, Khian Hooi

AU - Zhan, Qian

AU - Wu, Chung Lin

AU - Chai, Siang Piao

AU - Chu, Ying Hao

AU - Chang, Wei Sea

PY - 2019/1/9

Y1 - 2019/1/9

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AB - 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.

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