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

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posted on 2023-06-09, 03:32 authored by Grammatiki LioliouGrammatiki Lioliou, H K Chan, T Gohil, K V Vassilevski, N G Wright, A B Horsfall, Anna BarnettAnna Barnett
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 Ka) varied from 1.36 to 1.68 keV among different diodes.

Funding

Royal Society; RS130515

High Efficiency Betavoltaic Cells; G1455; STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCIL; ST/M002772/1

In situ X-ray Fluorescence Spectroscopy for Deep Sea Mining Applications; G1537; STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCIL; ST/M004635/1

History

Publication status

  • Published

File Version

  • Published version

Journal

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

ISSN

0168-9002

Publisher

Elsevier

Volume

840

Page range

145-152

Department affiliated with

  • Engineering and Design Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2016-10-17

First Open Access (FOA) Date

2016-10-17

First Compliant Deposit (FCD) Date

2016-10-17

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