2012 Fiscal Year Final Research Report
Development of high efficient gamma-ray cells with anti-radiation damage
| Project/Area Number |
23656604
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Energy engineering
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| Research Institution | Kyushu University |
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Principal Investigator |
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| Project Period (FY) |
2011 – 2012
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| Keywords | 放射線電池 / シリコン / テルル化カドミウム / ガンマ線 / コバルト 60 |
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| Research Abstract |
Gamma cells using Si and CdTe semiconductors have beendeveloped, and the best energy conversion ratios from gamma ray to electricity successfully reach over 5%. The energy conversion ratios depended on the cell thickness and ambient temperature. These characteristics are attributed to the life time and diffusion length of the carriers (electron- hole pairs) generated during the gamma ray irradiation. Although the decrease of the conversion ratio by long term irradiation is not avoided, it is found that the conversion ratios could be recovered by means of the heat treatment of the cells.
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