Manipulation of charge transfer and transport in plasmonic-ferroelectric hybrids for photoelectrochemical applications

Zhijie Wang, Dawei Cao, Liaoyong Wen, Rui Xu, Manuel Obergfell, Yan Mi, Zhibing Zhan, Nasori Nasori, Jure Demsar and Yong Lei ()
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Zhijie Wang: Institut für Physik & IMN MacroNano (ZIK), Technische Universität Ilmenau
Dawei Cao: Institut für Physik & IMN MacroNano (ZIK), Technische Universität Ilmenau
Liaoyong Wen: Institut für Physik & IMN MacroNano (ZIK), Technische Universität Ilmenau
Rui Xu: Institut für Physik & IMN MacroNano (ZIK), Technische Universität Ilmenau
Manuel Obergfell: University of Konstanz
Yan Mi: Institut für Physik & IMN MacroNano (ZIK), Technische Universität Ilmenau
Zhibing Zhan: Institut für Physik & IMN MacroNano (ZIK), Technische Universität Ilmenau
Nasori Nasori: Institut für Physik & IMN MacroNano (ZIK), Technische Universität Ilmenau
Jure Demsar: Institut für Physik & IMN MacroNano (ZIK), Technische Universität Ilmenau
Yong Lei: Institut für Physik & IMN MacroNano (ZIK), Technische Universität Ilmenau

Nature Communications, 2016, vol. 7, issue 1, 1-8

Abstract: Abstract Utilizing plasmonic nanostructures for efficient and flexible conversion of solar energy into electricity or fuel presents a new paradigm in photovoltaics and photoelectrochemistry research. In a conventional photoelectrochemical cell, consisting of a plasmonic structure in contact with a semiconductor, the type of photoelectrochemical reaction is determined by the band bending at the semiconductor/electrolyte interface. The nature of the reaction is thus hard to tune. Here instead of using a semiconductor, we employed a ferroelectric material, Pb(Zr,Ti)O3 (PZT). By depositing gold nanoparticle arrays and PZT films on ITO substrates, and studying the photocurrent as well as the femtosecond transient absorbance in different configurations, we demonstrate an effective charge transfer between the nanoparticle array and PZT. Most importantly, we show that the photocurrent can be tuned by nearly an order of magnitude when changing the ferroelectric polarization in PZT, demonstrating a versatile and tunable system for energy harvesting.

Date: 2016
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DOI: 10.1038/ncomms10348

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