High Detectivity and Transparent Few‐Layer MoS2/Glassy‐Graphene Heterostructure Photodetectors
Abstract
Layered van der Waals heterostructures have attracted considerable attention recently, due to their unique properties both inherited from individual two‐dimensional (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 × 1010 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.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jan 30, 2018
- Source ID
- 10.1002/adma.201706561
Entities
People
- Andrei V. Sergeev
- Dongyoung Kim
- Guifu Zou
- Hao Xu
- Huiyun Liu
- Jiang Wu
- Juntong Zhu
- Kimberley A. Sablon
- Wei Liu
- Xiao Dai
- Xiaoyu Han
- Zhengxiao Guo
Organizations
- China Scholarship Council
- Engineering and Physical Sciences Research Council
- National Natural Science Foundation of China
- United States Army Aeromedical Research Lab
- United States Army Research Laboratory
- University College London