Properties comparison between nanosecond X-ray detectors of polycrystalline and single-crystal diamond

Liu, L.Y.; Ouyang, Xiaoping; Zhang, J.F.; Jin, Peng; Su, Chunlei

doi:10.1016/j.diamond.2016.10.002

Cited by 15 publications

(8 citation statements)

References 16 publications

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“…New radiation detectors based on new materials have been developed. Diamond is a good detection medium, with an ultra-high neutron radiation resistance and stable properties at varying temperatures, but the applications of diamond detectors are badly restricted by the tiny dimension and high cost of high-quality diamond materials 14 – 19 . With the development of semiconductor technologies, silicon carbide (SiC) has been found to be an ideal material for radiation detection with better radiation resistance in intense radiation field and better stability at high temperature than silicon and germanium 20 – 27 .…”

Section: Introductionmentioning

confidence: 99%

Radiation Resistance of Silicon Carbide Schottky Diode Detectors in D-T Fusion Neutron Detection

Liu

Liu²,

Bai³

et al. 2017

Sci Rep

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Silicon carbide (SiC) is a wide band-gap semiconductor material with many excellent properties, showing great potential in fusion neutron detection. The radiation resistance of 4H-SiC Schottky diode detectors was studied experimentally by carefully analyzing the detectors’ properties before and after deuterium-tritium fusion neutron irradiation with the total fluence of 1.31 × 1014 n/cm2 and 7.29 × 1014 n/cm2 at room temperature. Significant degradation has been observed after neutron irradiation: reverse current increased greatly, over three to thirty fold; Schottky junction was broken down; significant lattice damage was observed at low temperature photoluminescence measurements; the peaks of alpha particle response spectra shifted to lower channels and became wider; the charge collection efficiency (CCE) decreased by about 7.0% and 22.5% at 300 V with neutron irradiation fluence of 1.31 × 1014 n/cm2 and 7.29 × 1014 n/cm2, respectively. Although the degradation exists, the SiC detectors successfully survive intense neutron radiation and show better radiation resistance than silicon detectors.

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Section: Introductionmentioning

confidence: 99%

Radiation Resistance of Silicon Carbide Schottky Diode Detectors in D-T Fusion Neutron Detection

Liu

Liu²,

Bai³

et al. 2017

Sci Rep

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“…Meanwhile, new materials have been increasingly exploited to be applied in X-ray detection. Organic single crystals, hybrid organic–inorganic perovskites (HOIPs), − semiconducting polymer blended with high- Z absorbers, GaN, and diamond have emerged as next-generation direct X-ray detectors. Even though the performance of the HOIP detectors is shining, special care should be taken on the issue of device degradation due to the X-ray-irradiation-induced structural and/or compositional changes .…”

mentioning

confidence: 99%

Flexible X-ray Detectors Based on Amorphous Ga₂O₃ Thin Films

et al. 2018

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Ga2O3, as an emerging optoelectronic material, is very appealing for the detection of ionizing radiation because of its low cost, wide band gap (4.5–5.0 eV) and radiation hardness. In this work, a flexible X-ray detector using amorphous Ga2O3 (a-Ga2O3) thin film is demonstrated. The a-Ga2O3 thin film was deposited on polyethylene naphthalate (PEN) substrate with delicately control of the oxygen flux during the radio frequency (RF) magnetron sputtering process. Metal/semiconductor/metal-structured photodetectors with coplanar interdigital electrodes were fabricated on this a-Ga2O3 film. Temporal response measurements under X-ray illumination indicate that a larger photocurrent occurs on the film deposited with smaller oxygen flux. A model combined with theoretical calculation is proposed to explain the enhancement of the X-ray photoresponsivity, which involves the slowing down of the annihilation rate caused by the neutralization of more ionized oxygen vacancy (Vo) states. No significant degradation of the device performance under UV and X-ray radiation is observed after the flexibility test. This finding informs a novel way to design the flexible X-ray and other ionizing radiation detectors based on amorphous oxide materials.

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“…Radiation dosage levels must be determined efficiently and accurately to be used safely. Diamond crystals have excellent prospects for use in fast-timing applications and environmental radiation monitoring due to their wide bandgap (5.5 eV), high breakdown voltage (10 7 V/cm), and intense radiation resistance, allowing them to detect radiation from α, γ, x-rays to UV and visible wavelengths [1]- [4]. Diamond has a faster time response than silicon.…”

Section: Introductionmentioning

confidence: 99%

Fast time response detectors of alpha particles fabricated using CVD diamonds

et al. 2023

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Diamond with extraordinary properties, such as fast response, and extremely high thermal conductivity, is an ideal choice for the next generation radiation detectors. In this paper, a radiation detector based on a single crystal CVD diamond (3 mm × 3 mm × 200 μm) with (100) orientation is proposed to detect α radiation. The detector employs gold films on the diamond as an electrical contact, and the origin-symmetric current-voltage characteristics demonstrated excellent Ohmic contact behavior. At an electric field of 0.4 V/μm, a current dark value of 4 nA was measured. The detector's pulse speed was tested using 5.486 MeV 241Am sources. The time response of the detector to α particles is fast, with a rise time of 260 ps, a fall time of 650 ps, and a pulse width of 1.6 ns. These findings indicate that the detector can be used as a sensor for α radiation.

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Properties comparison between nanosecond X-ray detectors of polycrystalline and single-crystal diamond

Cited by 15 publications

References 16 publications

Radiation Resistance of Silicon Carbide Schottky Diode Detectors in D-T Fusion Neutron Detection

Radiation Resistance of Silicon Carbide Schottky Diode Detectors in D-T Fusion Neutron Detection

Flexible X-ray Detectors Based on Amorphous Ga₂O₃ Thin Films

Fast time response detectors of alpha particles fabricated using CVD diamonds

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Properties comparison between nanosecond X-ray detectors of polycrystalline and single-crystal diamond

Cited by 15 publications

References 16 publications

Radiation Resistance of Silicon Carbide Schottky Diode Detectors in D-T Fusion Neutron Detection

Radiation Resistance of Silicon Carbide Schottky Diode Detectors in D-T Fusion Neutron Detection

Flexible X-ray Detectors Based on Amorphous Ga2O3 Thin Films

Fast time response detectors of alpha particles fabricated using CVD diamonds

Contact Info

Product

Resources

About

Flexible X-ray Detectors Based on Amorphous Ga₂O₃ Thin Films