Radiation hardness of cadmium telluride solar cells in proton therapy beam mode
Autoři:
Shinhaeng Cho aff001; Sang Hee Ahn aff002; Ick Joon Cho aff001; Yong Hyub Kim aff001; Jae-Uk Jeong aff001; Mee Sun Yoon aff001; Sung-Ja Ahn aff001; Woong-Ki Chung aff001; Taek-Keun Nam aff001; Ju-Young Song aff001
Působiště autorů:
Department of Radiation Oncology, Chonnam National University Medical School, Gwangju, Korea
aff001; Proton Therapy Center, National Cancer Center, Goyang, Korea
aff002
Vyšlo v časopise:
PLoS ONE 14(9)
Kategorie:
Research Article
doi:
https://doi.org/10.1371/journal.pone.0221655
Souhrn
We evaluated the durability of cadmium telluride (CdTe) solar cells upon proton beam irradiation as well as the possibility of achieving a dosimeter usable in proton beam therapy by applying 100 MeV of pencil beam scanning (PBS) irradiation. Specifically, a 100 MeV proton PBS beam was applied at irradiation doses of 0, 1012, 1013, 1014, and 1015 cm-2. According to the results, the remaining factors (defined as the ratio of the degraded value to the initial value) of open-circuit voltage (Voc), short-circuit current (Jsc), fill-factor (FF), and efficiency (ƞ) which are solar cell performance parameters, were approximately 89%, 44%, 69%, and 30%, respectively, compared to those of the reference cell (without irradiation) at the highest dose of 1×1015 cm-2. In particular, the conversion efficiency, which is the main factor, was approximately 70% of that of the reference cell even at a high fluence of 1×1014 cm-2. In addition, we observed the projected range of the hydrogen atoms based on the PBS beam energy using the Tool for Particle Simulation software and assessed the amount of fluence accumulated in a CdTe cell. As the energy increased, the fluence accumulated inside the cell tended to decrease owing to the characteristics of the Bragg peak of the proton. Thus, the radiation damage to the cell induced by the proton beam was reduced. The results of this study are expected to provide valuable reference information for research on dosimetry sensors composed of thin-film solar cells, serving as the basis for future application in proton beam therapy with CdTe solar cells.
Klíčová slova:
Physical sciences – Physics – Nuclear physics – Nucleons – Protons – Electromagnetic radiation – Solar radiation – Mathematics – Statistics – Materials science – Materials – Amorphous solids – Glass – Chemistry – Chemical elements – Hydrogen – Engineering and technology – Energy and power – Alternative energy – Photovoltaic power – Medicine and health sciences – Oncology – Cancer treatment – Radiation therapy – Clinical oncology – Clinical medicine – Research and analysis methods – Mathematical and statistical techniques – Statistical methods
Zdroje
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PLOS One
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