Nanoscale Bandgap Tuning across an Inhomogeneous Ferroelectric Interface

Jing Wang, Houbing Huang, Wangqiang He, Qinghua Zhang, Danni Yang, Yuelin Zhang, Renrong Liang, Chuanshou Wang, Xingqiao Ma, Lin Gu, Long-qing Chen, Ce Wen Nan, Jinxing Zhang

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

We report nanoscale bandgap engineering via a local strain across the inhomogeneous ferroelectric interface, which is controlled by the visible-light-excited probe voltage. Switchable photovoltaic effects and the spectral response of the photocurrent were explored to illustrate the reversible bandgap variation (∼0.3 eV). This local-strain-engineered bandgap has been further revealed by in situ probe-voltage-assisted valence electron energy-loss spectroscopy (EELS). Phase-field simulations and first-principle calculations were also employed for illustration of the large local strain and the bandgap variation in ferroelectric perovskite oxides. This reversible bandgap tuning in complex oxides demonstrates a framework for the understanding of the optically related behaviors (photovoltaic, photoemission, and photocatalyst effects) affected by order parameters such as charge, orbital, and lattice parameters.

Original languageEnglish (US)
Pages (from-to)24704-24710
Number of pages7
JournalACS Applied Materials and Interfaces
Volume9
Issue number29
DOIs
StatePublished - Jul 26 2017

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Ferroelectric materials
Energy gap
Tuning
Oxides
Photovoltaic effects
Electron energy loss spectroscopy
Photoemission
Electric potential
Photocatalysts
Photocurrents
Perovskite
Lattice constants

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

Cite this

Wang, J., Huang, H., He, W., Zhang, Q., Yang, D., Zhang, Y., ... Zhang, J. (2017). Nanoscale Bandgap Tuning across an Inhomogeneous Ferroelectric Interface. ACS Applied Materials and Interfaces, 9(29), 24704-24710. https://doi.org/10.1021/acsami.7b05138
Wang, Jing ; Huang, Houbing ; He, Wangqiang ; Zhang, Qinghua ; Yang, Danni ; Zhang, Yuelin ; Liang, Renrong ; Wang, Chuanshou ; Ma, Xingqiao ; Gu, Lin ; Chen, Long-qing ; Nan, Ce Wen ; Zhang, Jinxing. / Nanoscale Bandgap Tuning across an Inhomogeneous Ferroelectric Interface. In: ACS Applied Materials and Interfaces. 2017 ; Vol. 9, No. 29. pp. 24704-24710.
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author = "Jing Wang and Houbing Huang and Wangqiang He and Qinghua Zhang and Danni Yang and Yuelin Zhang and Renrong Liang and Chuanshou Wang and Xingqiao Ma and Lin Gu and Long-qing Chen and Nan, {Ce Wen} and Jinxing Zhang",
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Wang, J, Huang, H, He, W, Zhang, Q, Yang, D, Zhang, Y, Liang, R, Wang, C, Ma, X, Gu, L, Chen, L, Nan, CW & Zhang, J 2017, 'Nanoscale Bandgap Tuning across an Inhomogeneous Ferroelectric Interface', ACS Applied Materials and Interfaces, vol. 9, no. 29, pp. 24704-24710. https://doi.org/10.1021/acsami.7b05138

Nanoscale Bandgap Tuning across an Inhomogeneous Ferroelectric Interface. / Wang, Jing; Huang, Houbing; He, Wangqiang; Zhang, Qinghua; Yang, Danni; Zhang, Yuelin; Liang, Renrong; Wang, Chuanshou; Ma, Xingqiao; Gu, Lin; Chen, Long-qing; Nan, Ce Wen; Zhang, Jinxing.

In: ACS Applied Materials and Interfaces, Vol. 9, No. 29, 26.07.2017, p. 24704-24710.

Research output: Contribution to journalArticle

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AU - Wang, Jing

AU - Huang, Houbing

AU - He, Wangqiang

AU - Zhang, Qinghua

AU - Yang, Danni

AU - Zhang, Yuelin

AU - Liang, Renrong

AU - Wang, Chuanshou

AU - Ma, Xingqiao

AU - Gu, Lin

AU - Chen, Long-qing

AU - Nan, Ce Wen

AU - Zhang, Jinxing

PY - 2017/7/26

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AB - We report nanoscale bandgap engineering via a local strain across the inhomogeneous ferroelectric interface, which is controlled by the visible-light-excited probe voltage. Switchable photovoltaic effects and the spectral response of the photocurrent were explored to illustrate the reversible bandgap variation (∼0.3 eV). This local-strain-engineered bandgap has been further revealed by in situ probe-voltage-assisted valence electron energy-loss spectroscopy (EELS). Phase-field simulations and first-principle calculations were also employed for illustration of the large local strain and the bandgap variation in ferroelectric perovskite oxides. This reversible bandgap tuning in complex oxides demonstrates a framework for the understanding of the optically related behaviors (photovoltaic, photoemission, and photocatalyst effects) affected by order parameters such as charge, orbital, and lattice parameters.

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