A wafer-scale graphene and ferroelectric multilayer for flexible and fast-switched modulation applications

作者：Zhu Minmin; Wu Jing; Du Zehui; Tay Roland Yingjie; Li Hongling; Oezyilmaz Barbarous; Teo Edwin Hang Tong

来源：Nanoscale, 2015, 7(35): 14730-14737.

DOI：10.1039/c5nr03020j

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 similar to 0.8 x 10(13) 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 (similar to 302 Omega square(-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 (similar to 54.3 pm V-1) is obtained. Finally, the graphene and ferroelectric hybrid demonstrates a fast switching time (similar to 2 mu s) 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.

• 出版日期2015