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Title: A wafer-scale graphene and ferroelectric multilayer for flexible and fast-switched modulation applications
Authors: Zhu, Minmin
Wu, Jing
Du, Zehui
Tay, Roland Yingjie
Li, Hongling
Özyilmaz, Barbarous
Teo, Edwin Hang Tong
Keywords: Ferroelectric multilayer
Issue Date: 2015
Source: Zhu, M., Wu, J., Du, Z., Tay, R. Y., Li, H., Özyilmaz, B., et al. (2015). A wafer-scale graphene and ferroelectric multilayer for flexible and fast-switched modulation applications. Nanoscale, 7(35), 14730-14737.
Series/Report no.: Nanoscale
Abstract: Here we report a wafer-scale graphene/P(VDF-TrFE)/graphene multilayer for light-weight, flexible and fast-switched broadband modulation applications. The P(VDF-TrFE) film not only significantly reduces the sheet resistance of graphene throughout heavy doping of ∼0.8 × 1013 cm−2 by nonvolatile ferroelectric dipoles, but also acts as an efficient electro-optic (EO) layer. Such multilayered structural integration with remarkable ferroelectric polarization, high transparency (>90%), low sheet resistance (∼302 Ω □−1), and excellent mechanic flexibility shows the potential of a flexible modulation application over a broad range of wavelengths. Moreover, the derived device also exhibits strong field-induced EO modulation even under bending and one large Pockels coefficient (∼54.3 pm V−1) is obtained. Finally, the graphene and ferroelectric hybrid demonstrates a fast switching time (∼2 μs) and works well below low sheet resistance level over a long time. This work gives insights into the potential of graphene and ferroelectric hybrid structures, enabling future exploration on next-generation high-performance, flexible transparent electronics and photonics.
ISSN: 2040-3364
DOI: 10.1039/C5NR03020J
Schools: School of Electrical and Electronic Engineering 
Research Centres: CNRS International NTU THALES Research Alliances 
Temasek Laboratories 
Rights: © 2015 The Royal Society of Chemistry. This is the author created version of a work that has been peer reviewed and accepted for publication by Nanoscale, The Royal Society of Chemistry. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [].
Fulltext Permission: open
Fulltext Availability: With Fulltext
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