• 文献标题:   High Detectivity and Transparent Few-Layer MoS2/Glassy-Graphene Heterostructure Photodetectors
  • 文献类型:   Article
  • 作  者:   XU H, HAN XY, DAI X, LIU W, WU J, ZHU JT, KIM DY, ZOU GF, SABLON KA, SERGEEV A, GUO ZX, LIU HY
  • 作者关键词:   density functional theory, glassygraphene, heterostructure, mos2, photodetector
  • 出版物名称:   ADVANCED MATERIALS
  • ISSN:   0935-9648 EI 1521-4095
  • 通讯作者地址:   UCL
  • 被引频次:   37
  • DOI:   10.1002/adma.201706561
  • 出版年:   2018

▎ 摘  要

Layered van der Waals heterostructures have attracted considerable attention recently, due to their unique properties both inherited from individual twodimensional (2D) components and imparted from their interactions. Here, a novel few-layer MoS2/glassy-graphene heterostructure, synthesized by a layer-by-layer transfer technique, and its application as transparent photodetectors are reported for the first time. Instead of a traditional Schottky junction, coherent ohmic contact is formed at the interface between the MoS2 and the glassy-graphene nanosheets. The device exhibits pronounced wavelength selectivity as illuminated by monochromatic lights. A responsivity of 12.3 mA W-1 and detectivity of 1.8 x 10(10) Jones are obtained from the photodetector under 532 nm light illumination. Density functional theory calculations reveal the impact of specific carbon atomic arrangement in the glassy-graphene on the electronic band structure. It is demonstrated that the band alignment of the layered heterostructures can be manipulated by lattice engineering of 2D nanosheets to enhance optoelectronic performance.