Neutralizing the polarization effect of diamond diode detectors using periodic forward bias pulses

Holmes, Jason; Dutta, Maitreya; Koeck, Franz A.; Benipal, Manpuneet; Hathwar, Raghuraj; Brown, Jesse; Fox, Benjamin D.; Johnson, H. M.; Zaniewski, Anna; Alarcón, Ricardo; Chowdhury, Srabanti; Goodnick, Stephen M.; Nemanich, R. J.

doi:10.1016/j.diamond.2019.01.025

Cited by 9 publications

(4 citation statements)

References 14 publications

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“…The polarization effect becomes more pronounced as detectors are damaged by radiation over time [70]. The polarization effect can be neutralized in detector materials via heating the detector, alternating the bias polarity, setting the bias off and waiting, illuminating the detector [78].…”

Section: Polarization Effectmentioning

confidence: 99%

Perovskite: Scintillators, direct detectors, and X-ray imagers

et al. 2022

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Section: Polarization Effectmentioning

confidence: 99%

Perovskite: Scintillators, direct detectors, and X-ray imagers

et al. 2022

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“…However, in a practical detector, charge carriers often can get trapped at various defect sites such as: inclusions, grain boundaries, and plane dislocations in the diamond bulk [9 Besides the detection mechanism by its principles creates further inclusions, vacancies and damages.]. Several reports indicate that the density of traps in a SC CVD diamond detector increases progressively over a duration of each continuous use [7][8][9][10][11][12]. The accumulation of charges at defect sites as shown in Figure ( 1) could then result in an emergence of an internal electric field (E in ) between oppositely charged defect sites.…”

Section: Introductionmentioning

confidence: 99%

“…Consequently, a small variation in the net applied electric field has a pronounced effect on the reliability of the measurement. Reports have shown the strength and polarity of the applied electric field influences the trapping and detrapping dynamics of charge carriers [9][10][11]. Therefore, a study on the DC response of a SC CVD diamond neutron detector under various electric field values is necessary to understand the effect of measurement conditions on overall DC response of the detector.…”

Section: Introductionmentioning

confidence: 99%

Direct current mode neutron detection, investigation of polarization effect on 500 μm single crystal CVD diamond detector, and depolarization techniques

Ayalew,

Guckes,

Buckles

et al. 2023

Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XXV

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Electronic grade diamond such as single crystal (SC) chemical vapor deposition (CVD) diamond has excellent optoelectronic properties, which enables it to be used as a detector material for high energy detector applications. However, SC CVD diamond suffers from loss of signal contrast and performance over a period of continuous use due to polarization of the detector. When a SC CVD diamond is continuously exposed to radiation, trapped charge carriers build up at defect sites, resulting in the creation of a secondary electric field opposite to the bias field. The emergence of the secondary electric field causes charge collection efficiency loss and reduces the overall performance of the detector. In this work, the effect of polarization on the direct current (DC) neutron response of a 500 µm SC CVD diamond detector was investigated by irradiating the detector with 14.1 MeV neutrons produced from a deuterium-tritium neutron generator. Depolarization techniques were employed to de-trap charge carriers and decrease the strength of the secondary electric field. This was primarily through reverse biasing the applied field yet included scenarios with and without short-lived neutron irradiation. The results indicated that both without and with neutron irradiation techniques improved the stability of the detector response. The latter showed a superior stability at higher bias fields.

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“…The strength and the polarity of the applied electric field have been reported as key parameters associated with the behavior of the charge carrier transport during polarization. Holmes et al [ 28 ] proposed a method to depolarize a metal-insulator-metal (MIM)-structured detector which used periodic forward bias pulses, where recombination took place by allowing the charge of opposite polarity to neutralize the trapped charge. As soon as both carriers were in volume, there was a high probability that the opposite charge would be attracted to the trapped charge and recombine with it.…”

Section: Introductionmentioning

confidence: 99%

Ion Microprobe Study of the Polarization Quenching Techniques in Single Crystal Diamond Radiation Detectors

et al. 2022

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Synthetic single crystal diamond grown using the chemical vapor deposition technique constitutes an extraordinary candidate material for monitoring radiation in extreme environments. However, under certain conditions, a progressive creation of space charge regions within the crystal can lead to the deterioration of charge collection efficiency. This phenomenon is called polarization and represents one of the major drawbacks associated with using this type of device. In this study, we explore different techniques to mitigate the degradation of signal due to polarization. For this purpose, two different diamond detectors are characterized by the ion beam-induced charge technique using a nuclear microprobe, which utilizes MeV energy ions of different penetration depths to probe charge transport in the detectors. The effect of polarization is analyzed by turning off the bias applied to the detector during continuous or discontinuous irradiation, and also by alternating bias polarity. In addition, the beneficial influence of temperature for reducing the effect of polarization is also observed. Finally, the effect of illuminating the detector with light is also measured. Our experimental results indicate that heating a detector or turning off the bias, and then applying it during continuous irradiation can be used as satisfactory methods for recovering the CCE value close to that of a prepolarized state. In damaged regions, illumination with white light can be used as a standard method to suppress the strength of polarization induced by holes.

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Neutralizing the polarization effect of diamond diode detectors using periodic forward bias pulses

Cited by 9 publications

References 14 publications

Perovskite: Scintillators, direct detectors, and X-ray imagers

Perovskite: Scintillators, direct detectors, and X-ray imagers

Direct current mode neutron detection, investigation of polarization effect on 500 μm single crystal CVD diamond detector, and depolarization techniques

Ion Microprobe Study of the Polarization Quenching Techniques in Single Crystal Diamond Radiation Detectors

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