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Proton radiation effect on GaAs/AlGaAs core-shell ensemble nanowires photo-detector |
Li-Ying Tan(谭丽英), Fa-Jun Li(黎发军), Xiao-Long Xie(谢小龙), Yan-Ping Zhou(周彦平), Jing Ma(马晶) |
National Key Laboratory of Tunable Laser Technology, Harbin Institute of Technology, Harbin 150001, China |
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Abstract We demonstrate that the GaAs/AlGaAs nanowires (NWs) ensemble is fabricated into photo-detectors. Current-voltage (I-V) characteristics are measured on GaAs/AlGaAs core-shell ensemble NW photo-detectors at room-temperature before and after 1-MeV proton irradiation with fluences from 1.0×1013 cm-2 to 5.0×1014 cm-2. The degradation of photocurrent suggests that the point defects induced by proton radiation could cause both carrier lifetime and carrier mobility to decrease synchronously. Comparing with a GaAs quantum well, the degradations of light and dark current for the irradiated NWs photo-detector indicate that NWs material is a preferable potential candidate for space applications.
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Received: 22 March 2017
Revised: 16 April 2017
Accepted manuscript online:
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PACS:
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62.23.Hj
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(Nanowires)
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61.72.-y
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(Defects and impurities in crystals; microstructure)
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61.80.-x
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(Physical radiation effects, radiation damage)
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61.80.Jh
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(Ion radiation effects)
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Corresponding Authors:
Fa-Jun Li
E-mail: lifajun1201@gmail.com
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About author: 0.1088/1674-1056/26/8/ |
Cite this article:
Li-Ying Tan(谭丽英), Fa-Jun Li(黎发军), Xiao-Long Xie(谢小龙), Yan-Ping Zhou(周彦平), Jing Ma(马晶) Proton radiation effect on GaAs/AlGaAs core-shell ensemble nanowires photo-detector 2017 Chin. Phys. B 26 086202
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