• 文献标题:   A wafer-scale graphene and ferroelectric multilayer for flexible and fast-switched modulation applications
  • 文献类型:   Article
  • 作  者:   ZHU MM, WU J, DU ZH, TAY RY, LI HL, OZYILMAZ B, TEO EHT
  • 作者关键词:  
  • 出版物名称:   NANOSCALE
  • ISSN:   2040-3364 EI 2040-3372
  • 通讯作者地址:   Nanyang Technol Univ
  • 被引频次:   10
  • DOI:   10.1039/c5nr03020j
  • 出版年:   2015

▎ 摘  要

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.