4H-SiC Schottky diode arrays for X-ray detection

Lioliou, G, Chan, H K, Gohil, T, Vassilevski, K V, Wright, N G, Horsfall, A B and Barnett, A M (2016) 4H-SiC Schottky diode arrays for X-ray detection. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 840. pp. 145-152. ISSN 0168-9002

[img] PDF - Published Version
Available under License Creative Commons Attribution.

Download (1MB)

Abstract

Five SiC Schottky photodiodes for X-ray detection have been electrically characterized at room temperature.
One representative diode was also electrically characterized over the temperature range 20°C to 140 °C. The performance at 30 °C of all five X-ray detectors, in both current mode and for photon counting X-ray spectroscopy was investigated. The diodes were fabricated in an array form such that they could be operated as either a 2×2 or 1×3 pixel array. Although the devices showed double barrier heights, high ideality factors and higher than expected leakage current at room temperature (12 nA/cm2 at an internal electric field of 105 kV/ cm), they operated as spectroscopic photon counting soft X-ray detectors uncooled at 30 °C. The measured energy resolution (FWHM at 17.4 keV, Mo Kα) varied from 1.36 to 1.68 keV among different diodes.

Item Type: Article
Keywords: Silicon carbide, Schottky diodes, X-ray spectroscopy, High temperature,
Schools and Departments: School of Engineering and Informatics > Engineering and Design
Subjects: Q Science > QB Astronomy
Q Science > QC Physics
Depositing User: Grammatiki Lioliou
Date Deposited: 17 Oct 2016 11:02
Last Modified: 06 Mar 2017 23:29
URI: http://sro.sussex.ac.uk/id/eprint/64783

View download statistics for this item

📧 Request an update
Project NameSussex Project NumberFunderFunder Ref
High Efficiency Betavoltaic CellsG1455STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCILST/M002772/1
In situ X-ray Fluorescence Spectroscopy for Deep Sea Mining ApplicationsG1537STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCILST/M004635/1
UnsetUnsetRoyal SocietyRS130515