Simulations about self-absorption of tritium in titanium tritide and the energy deposition in a silicon Schottky barrier diode

Li, Hao; Liu, Yebing; Hu, Rui; Yang, Yuqing; Wang, Guanquan; Zhong, Z.; Luo, Shunzhong

doi:10.1016/j.apradiso.2012.07.012

Cited by 29 publications

(18 citation statements)

References 12 publications

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“…The resulting beta particle energy spectrum leaving the source surface, the beta particle average energy leaving the source surface, and the associated beta fluxes were estimated for the simulation results. Figure A shows that the Fermi distribution of an ideal beta energy spectrum changes with the thickness of the source for 0°. The comparison of the beta energy spectrums leaving the source surface for various source positions indicates that fewer particles come out of the surface and the peak of the spectrum shifts toward higher beta energy with the source in deeper thickness position resulting in a hardened energy spectrum.…”

Section: Resultsmentioning

confidence: 99%

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Design and optimization of radioisotope sources for betavoltaic batteries

et al. 2018

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A Monte Carlo source model using PENELOPE was developed to investigate different tritiated metals in order to design a better radioisotope source for betavoltaic batteries. The source model takes into account the self-absorption of beta particles in the source which is a major factor for an efficient source design. The average beta energy, beta flux, source power output, and source efficiency were estimated for various source thicknesses. The simulated results for titanium tritide with 0°and 90°angular distributions of beta particles were validated with experimental results. The importance of the backscattering effect due to isotropic particle emission was analyzed. The results showed that the normalized average beta energy increases with the source thickness, and it reaches peak energy depending on the density and the specific activity of the source. The beta flux and power output also increase with increasing source thickness. However, the incremental increase in beta flux and power output becomes minimal for higher thicknesses, as the source efficiency decreases significantly at higher thicknesses due to the self-absorption effect. Thus, a saturation threshold is reached. A low-density source material such as beryllium tritide provided a higher power output with higher efficiency. A maximum power output of approximately 4 mW/cm 3 was obtained for beryllium tritide with SiC. A form factor approach was used to estimate the optimum source thickness. The optimum source thickness was found near the thickness where the peak beta particle average energy occurs.

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Section: Resultsmentioning

confidence: 99%

“…A higher source thickness increases the battery power output. However, the self‐absorption of beta particles in the source increases with the thickness of the source . Therefore, the source thickness needs to be optimized to achieve better efficiency in the design.…”

Section: Introductionmentioning

confidence: 99%

Design and optimization of radioisotope sources for betavoltaic batteries

et al. 2018

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“…The value of electron utilization efficiency postsaturation is around 0.67. The effect of source thickness on the betavoltaic-cell efficiency, especially emitting power, has been explained using the self-absorption effect in a previous study [13]. However, the thickness of the betavoltaic cell upon saturation of output power is much larger for a metal source than a non-metal source.…”

Section: Rectangular Geometrymentioning

confidence: 99%

“…Then, the lithium ion batteries have been more widely used until now, but also they have limitation like limited specific energy and energy density compared with radioisotope batteries, which have 100-10 000 times greater energy density than chemical and lithium ion batteries [10][11][12][13]. In addition, existing batteries, such as solar and chemical batteries, are difficult to operate inside the human body or in space because of operation temperatures and lifetime limitation [13,14].…”

Section: Introductionmentioning

confidence: 99%

Enhancement of energy performance in betavoltaic cells by optimizing self-absorption of beta particles

Kim

Lee

Jung

et al. 2015

Int. J. Energy Res.

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Summary Multi‐layered Ni‐63 betavoltaic cell was investigated for improving the current density and the source efficiency. The model of betavoltaic cells, which typically consist of Ni‐63 radioisotope source, semiconductors, and electrodes, was built using MCNP6, and the emission and absorption behaviours of beta particles throughout the cell were analysed with changing geometrical shape of the betavoltaic cell and thickness of radioisotope source layer in order to achieve the improved current density and efficiency of the cell. The result showed that the fluence of beta particles generally increases with the increase of radioisotope thickness up to 10 µm in both rectangular and cylindrical geometry, while it remains nearly constant above the specific thickness because of the self‐absorption effect. Moreover, the results showed that current density of betavoltaic cell could be achieved in cylindrical geometry (1.67 μA/cm2) comparing with rectangular one (1.54 μA/cm2) based on the optimum thickness of Ni‐63 radioisotope thickness with the consideration of self‐absorption. Copyright © 2015 John Wiley & Sons, Ltd.

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“…Increasing the activity and choosing a radioactive source of high‐energy are the most direct ways to improve the output performance of nuclear cells to meet the power requirements of MEMS. Previous studies have shown that the particles (α, β, γ, and X‐ray) decayed from the radioactive source can easily make radiation damage on the semiconductor for the radiovoltaic nuclear battery with direct energy conversion …”

Section: Introductionmentioning

confidence: 99%

Novel radioluminescent nuclear battery: Spectral regulation of perovskite quantum dots

et al. 2018

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CsPbBr 3 and CsPbBr 1.5 I 1.5 perovskite quantum dots (QDs) are synthesized by hot-injection with PPO (2,5-diphenyloxazole) as a fluorescent material for radioluminescent nuclear battery. The results reveal that the fluorescence of the QD/PPO system consists of radioluminescence (4.79%-5.35%) and photoluminescence (nearly 95%). The addition of QDs leads to more excellent optical and electrical properties of radioluminescent nuclear battery. The peak position of the radioluminescence spectra of QD/PPO can be regulated by controlling the components of QDs. This strategy is suitable for obtaining a satisfactory spectral matching factor for different photovoltaic devices to obtain outstanding output performance. Moreover, good selection of QD/PPO as a fluorescent material can significantly improve the overall output performance of the radioluminescent nuclear battery. The linear relationship between optical and electrical properties was presented. Perovskite QDs exhibit excellent application prospects for the (α, β, γ, and X-ray sources) radioluminescent nuclear battery and X-ray imaging technology.

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Simulations about self-absorption of tritium in titanium tritide and the energy deposition in a silicon Schottky barrier diode

Cited by 29 publications

References 12 publications

Design and optimization of radioisotope sources for betavoltaic batteries

Design and optimization of radioisotope sources for betavoltaic batteries

Enhancement of energy performance in betavoltaic cells by optimizing self-absorption of beta particles

Novel radioluminescent nuclear battery: Spectral regulation of perovskite quantum dots

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