Application of InGaP space solar cells for a radiation dosimetry at high dose rates environment of Fukushima Daiichi nuclear power plant

Okuno, Yasuki; Okubo, Nariaki; Imaizumi, Mitsuru

doi:10.1080/00223131.2019.1585987

Cited by 11 publications

(8 citation statements)

References 22 publications

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“…The output of a neutron signal in a high-dose γ-ray environment can be measured from each element by installing devices with and without a converter near each other, provided the output current of the imparted energy is defined. The following equation describes the change in the short-circuit current generated under a radiation environment ( J SC ) (A cm –2 ) with the deposited power ( P ; MeV s –1 ) where q represents the elementary charge, and ε (eV) denotes the threshold energy required to produce one hole–electron pair. K exe ( P ) represents the external quantum efficiency at a certain deposited energy value, and it is considered to depend on the light current behavior shown in Figure c.…”

Section: Results and Discussionmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%

“…Devices with thin-film shapes exhibit sensitivity from their surface to the depth of a few micrometers; they are also predicted to be applicable on converters such as Li and B, generating high-energy charged particles. In such cases, when perovskite solar cells coated with the converters are used, the charged particles emitted from the neutron absorber tend to enter the semiconductor device, whereby further electron–hole pairs are generated and collected at the electrodes via a self-powered phenomenon. , Previous studies on space utilization have reported that solar cells employing perovskite thin films exhibit strong radiation resistances under high-energy charged particles such as electrons and protons. This high radiation resistance can also be advantageous for high-flux neutron detection, considering the radiation damage caused by the bombardment of neutrons and high-energy charged particles.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, a built-in-potential-driven radiation detector was developed using a high-efficiency photovoltaic device. Previous studies , have reported the application of Si and III–V compound semiconductor solar cells, wherein the radiation-induced current depended on the radiation dose rate. These detectors do not require an external power source to generate a signal output and enable the use of long cables because the voltage drop due to the cables is negligible.…”

Section: Introductionmentioning

confidence: 99%

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Hybrid Organic–Inorganic Perovskite Semiconductor-Based High-Flux Neutron Detector with BN Converter

Okuno

Matsui

Kobayashi

et al. 2022

ACS Appl. Electron. Mater.

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Neutrons are analyzed in various fields such as space exploration, neutron radiography, and medicine. When neutrons are employed, a neutron detector is required to control the exposure dose. However, issues such as detector radiation tolerance, response linearity, and γ-ray noise limit the development of effective neutron detectors. Metal halide perovskite based direct conversion radiation detectors exhibit attractive characteristics such as being solution-processable at low temperatures and possessing tunable band gaps, low trap density, high charge carrier mobility, high radiation tolerance, and fast responses. The perovskite device’s potential for high-flux neutron applications has not been greatly determined; however, only related research has been conducted thus far. Here, we demonstrate a hybrid organic–inorganic perovskite semiconductor based neutron detector that satisfies all high-flux neutron detection requirements. The perovskite device was designed to possess a structure similar to that of solar cells and could be driven solely by the built-in potential, without an applied voltage. Using this perovskite device, a neutron detector was designed to maximize the efficiency of the back side conversion configuration and minimize sensitivity variations. Experiments on irradiation with the spectrum neutrons and calculations of the reaction rates revealed a 25 meV neutron sensitivity of 6.0 × 10–17 A n–1 cm–2 and a detection limit of 106 n cm–2 s–1. Further, an optical response test showed that a dynamic detection range with 6–7 orders of magnitude was realized. The detection characteristics for high-flux neutrons indicated a stable operation with no degradation during neutron irradiation at a fluence of −1012 cm–2. Moreover, noise from γ-rays had an insignificant effect on the accuracy of the neutron flux measurements. These results highlight that the proposed neutron detector based on a perovskite solar cell is a suitable monitoring sensor for high-flux neutrons.

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Section: Results and Discussionmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Hybrid Organic–Inorganic Perovskite Semiconductor-Based High-Flux Neutron Detector with BN Converter

Okuno

Matsui

Kobayashi

et al. 2022

ACS Appl. Electron. Mater.

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show abstract

“…We have proposed a radiation dosimeter using a solar cell. [2][3][4] Solar cell has a similar structure to a semiconductor radiation detector. The conventional semiconductor radiation detectors have relatively thick structures, because the absorption coefficient of radiation is much smaller than that of sunlight in semiconductors.…”

Section: Introductionmentioning

confidence: 99%

Gamma-ray irradiation effects on CdTe solar cell dosimeter

Okamoto

Igari

Fukui

et al. 2021

Jpn. J. Appl. Phys.

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Compact and radiation-tolerant radiation dosimeter without bias voltage application using solar cells such as CdTe was proposed for severe radiation environment near a nuclear reactor pressure vessel. In this work, γ-ray tolerance and γ-ray detection characteristics of CdTe solar cells were investigated. It was found that the CdTe solar cell has sufficient tolerance against γ-ray exposure up to 3 MGy. It was demonstrated that γ-ray induced current density linearly increased with increasing γ-ray intensity in the range up to approximately 1.5 kGy h−1. This result indicates that high dose-rate radiation detection can be performed using solar cells without voltage application. In addition, γ-ray sensitivity was successfully improved by a stack of CdTe solar cells with parallel connections. Furthermore, γ rays can be detected with high responsivity and small noise even under a high flux neutron environment.

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Effect of high temperature on the performance of radiation‐protected ultra‐high performance concrete containing mixed fibers

Han

Liao

et al. 2023

Structural Concrete

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The internal structure of ultra‐high performance concrete (UHPC) is very dense and prone to flaking in high‐temperature environments, thereby limiting its application in high‐temperature environments. In this study, polypropylene (PP) fibers were used in partially replacing steel fibers to prepare radiation‐protected UHPC‐containing hybrid fibers. The working performance, spalling behavior, mass loss, mechanical properties, γ‐ray shielding performance, and microstructure after exposure to different target temperatures (25°C, 200°C, 400°C, 600°C, and 800°C) of the radiation‐protected UHPC containing hybrid fibers were investigated. Results showed that the increase of PP fiber admixture did not have a significant negative effect on the flowability of UHPC mixes. The combination of steel fiber and PP fiber can effectively inhibit the spalling of UHPC at a high temperature. With the increase of temperature, the compressive strength and splitting tensile strength of UHPC showed a trend of first increasing and then decreasing, and the γ‐ray shielding performance gradually decreased. Compared with the normal temperature, the linear attenuation coefficient (μ) of UHPC at 800°C decreased by 12.6%, HVL and TVL decreased by 14.4%. Microstructural analysis showed that the porosity of UHPC increased with the increase of temperature, and the proportion of harmless pores showed a trend of increasing and then decreasing. Moreover, the high temperature led to the deterioration in the microscopic morphology of UHPC and the weakening of the bond between the steel fiber and the matrix. These findings revealed the reason for the decrease in mechanical properties of UHPC at high temperatures.

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Application of InGaP space solar cells for a radiation dosimetry at high dose rates environment of Fukushima Daiichi nuclear power plant

Cited by 11 publications

References 22 publications

Hybrid Organic–Inorganic Perovskite Semiconductor-Based High-Flux Neutron Detector with BN Converter

Hybrid Organic–Inorganic Perovskite Semiconductor-Based High-Flux Neutron Detector with BN Converter

Gamma-ray irradiation effects on CdTe solar cell dosimeter

Effect of high temperature on the performance of radiation‐protected ultra‐high performance concrete containing mixed fibers

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