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4H-SiC Schottky diodes with Ni2Si contacts for X-ray detection
journal contribution
posted on 2023-06-09, 18:19 authored by Grammatiki LioliouGrammatiki Lioliou, N R Gemmell, M Mazzillo, A Sciuto, Anna BarnettAnna Barnett4H-SiC Schottky photodiodes, with epitaxial layers, employing thin (20 nm) Ni2Si Schottky contacts, were investigated for high temperature photon counting X-ray spectroscopy. Important X-ray photodiode detector parameters were extracted from electrical characterization within the temperature range 160 °C to 0 °C. The devices were found to be fully depleted at an applied electric field of 20 kV/cm; a leakage current density of 33 nA cm 1 nA cm-2 at 160 °C, was measured for one of the devices. The detectors were subsequently connected to low-noise photon counting readout electronics and investigated for their spectral performance at temperatures up to 100 °C. With the charge-sensitive preamplifier operated at the same temperature as the detector the best energy resolution (Full Width at Half Maximum at 5.9 keV) obtained decreased from 2.20 keV 0.04 keV (120 e rms 2 e rms) at 100 C to 1.20 keV 0.03 keV (65 e rms 2 e rms) at 0 C. The dominant source of noise broadening the 55Fe X-ray photopeak was found to be the dielectric noise, except for the spectra accumulated at 100 °C and long shaping times (>), in those case the main source of photopeak broadening was the white parallel noise.
Funding
Photon counting X-ray and gamma-ray spectroscopy with Al0.52In0.48P detectors; G2140; EPSRC-ENGINEERING & PHYSICAL SCIENCES RESEARCH COUNCIL; EP/P021271/1
Leverhulme Trust
History
Publication status
- Published
File Version
- Accepted version
Journal
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated EquipmentISSN
0168-9002Publisher
ElsevierExternal DOI
Volume
940Page range
328-336Department affiliated with
- Engineering and Design Publications
Research groups affiliated with
- Space Research Group Publications
Notes
A.M.B. acknowledges funding from the Leverhulme Trust, United Kingdom, in the form of a 2016 Philip Leverhulme Prize. Data underlying this work are subject to commercially confidentiality. The Authors regret that they cannot grant public requests for further access to any data produced during the study.Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2019-07-05First Open Access (FOA) Date
2020-06-19First Compliant Deposit (FCD) Date
2019-07-04Usage metrics
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