Highly efficient UV detection in a metal-semiconductor-metal detector with epigraphene
Journal article, 2022
We show that epitaxial graphene on silicon carbide (epigraphene) grown at high temperatures (T >1850 °C) readily acts as material for implementing solar-blind ultraviolet (UV) detectors with outstanding performance. We present centimeter-sized epigraphene metal-semiconductor-metal (MSM) detectors with a peak external quantum efficiency of η ∼85% for wavelengths λ = 250-280 nm, corresponding to nearly 100% internal quantum efficiency when accounting for reflection losses. Zero bias operation is possible in asymmetric devices, with the responsivity to UV remaining as high as R = 134 mA/W, making this a self-powered detector. The low dark currents Io ∼50 fA translate into an estimated record high specific detectivity D = 3.5 × 1015 Jones. The performance that we demonstrate, together with material reproducibility, renders epigraphene technologically attractive to implement high-performance planar MSM devices with a low processing effort, including multi-pixel UV sensor arrays, suitable for a number of practical applications.
Author
Hans He
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
RISE Research Institutes of Sweden
2D-Tech
Naveen Shetty
2D-Tech
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
Sergey Kubatkin
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
2D-Tech
Pascal Stadler
2D-Tech
Chalmers, Microtechnology and Nanoscience (MC2), Applied Quantum Physics
Tomas Löfwander
Chalmers, Microtechnology and Nanoscience (MC2), Applied Quantum Physics
Mikael Fogelström
Chalmers, Microtechnology and Nanoscience (MC2)
2D-Tech
J. C. Miranda-Valenzuela
Monterrey Institute of Technology and Higher Education
Rositsa Yakimova
Linköping University
Graphensic AB
Thilo Bauch
2D-Tech
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
Samuel Lara Avila
2D-Tech
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
National Physical Laboratory (NPL)
Applied Physics Letters
0003-6951 (ISSN) 1077-3118 (eISSN)
Vol. 120 19 191101Novel two-dimensional systems: from growth to applications
Swedish Foundation for Strategic Research (SSF) (RMA15-0024), 2016-05-01 -- 2021-06-30.
Epitaxiell grafen för metrologi, sensorer och elektronik
Swedish Foundation for Strategic Research (SSF) (GMT14-0077), 2016-01-01 -- 2020-12-31.
2D material-based technology for industrial applications (2D-TECH)
VINNOVA (2019-00068), 2020-05-01 -- 2024-12-31.
GKN Aerospace Sweden (2D-tech), 2021-01-01 -- 2024-12-31.
Subject Categories
Accelerator Physics and Instrumentation
Other Chemical Engineering
Other Electrical Engineering, Electronic Engineering, Information Engineering
Areas of Advance
Nanoscience and Nanotechnology
Materials Science
DOI
10.1063/5.0090219