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20 August 2020 Development of β-Ga2O3 for next generation radiation detectors
Ge Yang, Ibrahim Hany
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Proceedings Volume 11494, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XXII; 114940I (2020) https://doi.org/10.1117/12.2568286
Event: SPIE Optical Engineering + Applications, 2020, Online Only
Abstract
In this work, we investigated x-ray radiation detection capability of β-Ga2O3 doped with Fe for minimizing leakage current through Fe n-conductivity compensation. (010) EFG grown Fe-doped β-Ga2O3 was tested as a low-noise X-ray detector with Ti/Au electrodes vertical structure. Its performance at low, high and no applied voltages was examined. The fabricated detector showed high X-ray detection performance manifested in its signal’s short fall and rise time (< 0.3 sec) in all operation modes, and the same temporal response was exhibited by a tested Au/Ni/β-Ga2O3/Ti/Au device. The detector’s signal is also characterized by excellent linear relation with X-ray tube power and current and high signal to noise ratio (SNR) optimized at -5 V (> 103). Moreover, the X-ray induced current signal exhibits high stability. Sub-band UV photocurrent signal showed a significantly slower response compared to X-ray induced conductivity signal.
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Ge Yang and Ibrahim Hany "Development of β-Ga2O3 for next generation radiation detectors", Proc. SPIE 11494, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XXII, 114940I (20 August 2020); https://doi.org/10.1117/12.2568286
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KEYWORDS
Sensors
X-ray detectors
X-rays
Signal detection
Iron
Signal to noise ratio
Electrodes
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