Hall sensors batch-fabricated on all-CVD h-BN/graphene/h-BN heterostructures
Journal article, 2017

The two-dimensional (2D) material graphene is highly promising for Hall sensors due to its potential of having high charge carrier mobility and low carrier concentration at room temperature. Here, we report the scalable batch-fabrication of magnetic Hall sensors on graphene encapsulated in hexagonal boron nitride (h-BN) using commercially available large area CVD grown materials. The all-CVD grown h-BN/graphene/h-BN van der Waals heterostructures were prepared by layer transfer technique and Hall sensors were batch-fabricated with 1D edge metal contacts. The current-related Hall sensitivities up to 97 V/AT are measured at room temperature. The Hall sensors showed robust performance over the wafer scale with stable characteristics over six months in ambient environment. This work opens avenues for further development of growth and fabrication technologies of all-CVD 2D material heterostructures and allows further improvements in Hall sensor performance for practical applications.

hexagonal boron-nitride

layer

devices

quality

graphene

growth

performance

magnetic-field

Author

André Dankert

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

Bogdan Karpiak

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

Saroj Prasad Dash

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

Scientific Reports

2045-2322 (ISSN)

Vol. 7

Graphene-Based Revolutions in ICT And Beyond (Graphene Flagship)

European Commission (FP7), 2013-10-01 -- 2016-03-31.

Areas of Advance

Nanoscience and Nanotechnology (2010-2017)

Subject Categories

Materials Engineering

DOI

10.1038/s41598-017-12277-8

PubMed

29123124

More information

Created

12/4/2017