Electron transport and visible light absorption in a plasmonic photocatalyst based on strontium niobate

D. Y. Wan; Y. L. Zhao; Y. Cai; T. C. Asmara; Z. Huang; J. Q. Chen; J. Hong; S. M. Yin; C. T. Nelson; M. R. Motapothula; B. X. Yan; D. Xiang; X. Chi; H. Zheng; W. Chen; R. Xu; Ariando; A. Rusydi; A. M. Minor; M. B.H. Breese; M. Sherburne; M. Asta; Q. H. Xu; T. Venkatesan

doi:10.1038/ncomms15070

Electron transport and visible light absorption in a plasmonic photocatalyst based on strontium niobate

D. Y. Wan, Y. L. Zhao, Y. Cai, T. C. Asmara, Z. Huang, J. Q. Chen, J. Hong, S. M. Yin, C. T. Nelson, M. R. Motapothula, B. X. Yan, D. Xiang, X. Chi, H. Zheng, W. Chen, R. Xu, Ariando, A. Rusydi, A. M. Minor, M. B.H. BreeseM. Sherburne, M. Asta, Q. H. Xu, T. Venkatesan

Research output: Contribution to journal › Article › peer-review

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Abstract

Semiconductor compounds are widely used for photocatalytic hydrogen production applications, where photogenerated electron-hole pairs are exploited to induce catalysis. Recently, powders of a metallic oxide (Sr_1-xNbO₃, 0.03<x<0.20) were reported to show competitive photocatalytic efficiencies under visible light, which was attributed to interband absorption. This discovery expanded the range of materials available for optimized performance as photocatalysts. Here we study epitaxial thin films of SrNbO_3+δ and find that their bandgaps are ∼4.1 eV. Surprisingly, the carrier density of the conducting phase exceeds 10²²cm^-3 and the carrier mobility is only 2.47 cm² V^-1 s^-1. Contrary to earlier reports, the visible light absorption at 1.8 eV (∼688 nm) is due to the plasmon resonance, arising from the large carrier density. We propose that the hot electron and hole carriers excited via Landau damping (during the plasmon decay) are responsible for the photocatalytic property of this material under visible light irradiation.

Original language	English
Article number	15070
Journal	Nature Communications
Volume	8
DOIs	https://doi.org/10.1038/ncomms15070
State	Published - Apr 19 2017
Externally published	Yes

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Wan, D. Y., Zhao, Y. L., Cai, Y., Asmara, T. C., Huang, Z., Chen, J. Q., Hong, J., Yin, S. M., Nelson, C. T., Motapothula, M. R., Yan, B. X., Xiang, D., Chi, X., Zheng, H., Chen, W., Xu, R., Ariando, Rusydi, A., Minor, A. M., ... Venkatesan, T. (2017). Electron transport and visible light absorption in a plasmonic photocatalyst based on strontium niobate. Nature Communications, 8, Article 15070. https://doi.org/10.1038/ncomms15070

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title = "Electron transport and visible light absorption in a plasmonic photocatalyst based on strontium niobate",

abstract = "Semiconductor compounds are widely used for photocatalytic hydrogen production applications, where photogenerated electron-hole pairs are exploited to induce catalysis. Recently, powders of a metallic oxide (Sr1-xNbO3, 0.033+δ and find that their bandgaps are ∼4.1 eV. Surprisingly, the carrier density of the conducting phase exceeds 1022cm-3 and the carrier mobility is only 2.47 cm2 V-1 s-1. Contrary to earlier reports, the visible light absorption at 1.8 eV (∼688 nm) is due to the plasmon resonance, arising from the large carrier density. We propose that the hot electron and hole carriers excited via Landau damping (during the plasmon decay) are responsible for the photocatalytic property of this material under visible light irradiation.",

author = "Wan, {D. Y.} and Zhao, {Y. L.} and Y. Cai and Asmara, {T. C.} and Z. Huang and Chen, {J. Q.} and J. Hong and Yin, {S. M.} and Nelson, {C. T.} and Motapothula, {M. R.} and Yan, {B. X.} and D. Xiang and X. Chi and H. Zheng and W. Chen and R. Xu and Ariando and A. Rusydi and Minor, {A. M.} and Breese, {M. B.H.} and M. Sherburne and M. Asta and Xu, {Q. H.} and T. Venkatesan",

year = "2017",

month = apr,

day = "19",

doi = "10.1038/ncomms15070",

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Wan, DY, Zhao, YL, Cai, Y, Asmara, TC, Huang, Z, Chen, JQ, Hong, J, Yin, SM, Nelson, CT, Motapothula, MR, Yan, BX, Xiang, D, Chi, X, Zheng, H, Chen, W, Xu, R, Ariando, Rusydi, A, Minor, AM, Breese, MBH, Sherburne, M, Asta, M, Xu, QH & Venkatesan, T 2017, 'Electron transport and visible light absorption in a plasmonic photocatalyst based on strontium niobate', Nature Communications, vol. 8, 15070. https://doi.org/10.1038/ncomms15070

TY - JOUR

T1 - Electron transport and visible light absorption in a plasmonic photocatalyst based on strontium niobate

AU - Wan, D. Y.

AU - Zhao, Y. L.

AU - Cai, Y.

AU - Asmara, T. C.

AU - Huang, Z.

AU - Chen, J. Q.

AU - Hong, J.

AU - Yin, S. M.

AU - Nelson, C. T.

AU - Motapothula, M. R.

AU - Yan, B. X.

AU - Xiang, D.

AU - Chi, X.

AU - Zheng, H.

AU - Chen, W.

AU - Xu, R.

AU - Ariando,

AU - Rusydi, A.

AU - Minor, A. M.

AU - Breese, M. B.H.

AU - Sherburne, M.

AU - Asta, M.

AU - Xu, Q. H.

AU - Venkatesan, T.

PY - 2017/4/19

Y1 - 2017/4/19

N2 - Semiconductor compounds are widely used for photocatalytic hydrogen production applications, where photogenerated electron-hole pairs are exploited to induce catalysis. Recently, powders of a metallic oxide (Sr1-xNbO3, 0.033+δ and find that their bandgaps are ∼4.1 eV. Surprisingly, the carrier density of the conducting phase exceeds 1022cm-3 and the carrier mobility is only 2.47 cm2 V-1 s-1. Contrary to earlier reports, the visible light absorption at 1.8 eV (∼688 nm) is due to the plasmon resonance, arising from the large carrier density. We propose that the hot electron and hole carriers excited via Landau damping (during the plasmon decay) are responsible for the photocatalytic property of this material under visible light irradiation.

AB - Semiconductor compounds are widely used for photocatalytic hydrogen production applications, where photogenerated electron-hole pairs are exploited to induce catalysis. Recently, powders of a metallic oxide (Sr1-xNbO3, 0.033+δ and find that their bandgaps are ∼4.1 eV. Surprisingly, the carrier density of the conducting phase exceeds 1022cm-3 and the carrier mobility is only 2.47 cm2 V-1 s-1. Contrary to earlier reports, the visible light absorption at 1.8 eV (∼688 nm) is due to the plasmon resonance, arising from the large carrier density. We propose that the hot electron and hole carriers excited via Landau damping (during the plasmon decay) are responsible for the photocatalytic property of this material under visible light irradiation.

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U2 - 10.1038/ncomms15070

DO - 10.1038/ncomms15070

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AN - SCOPUS:85018472275

SN - 2041-1723

VL - 8

JO - Nature Communications

JF - Nature Communications

M1 - 15070

ER -

Electron transport and visible light absorption in a plasmonic photocatalyst based on strontium niobate

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