[9p-Z15-1~10] 13.9 Compound solar cells

[9p-Z15-1] Gamma-Ray Irradiation Effects on CdTe Solar Cell Dosimeter

〇Tamotsu Okamoto¹, Takahiro Fukui¹, Ryuto Tozawa¹, Yasuhito Gotoh², Nobuhiro Sato², Tomohiro Kobayashi³, Mitsuru Imaizumi⁴, Yasuki Okuno⁵, Masafumi Akiyoshi⁶ (1.NIT, Kisarazu Coll., 2.Kyoto Univ., 3.RIKEN, 4.JAXA, 5.Tohoku Univ., 6.Osaka Pref. Univ.)

Keywords:CdTe, CdTe solar cell, II-VI compounds

In this work, compact and higly radiation-tolerant radiation dosimeter without voltage-bias application using solar cell such as CdTe is proposed for severe radiation environment near a nuclear reactor pressure vessel. First, gamma-ray tolerance of a CdTe solar cells was investigated. It was found that the CdTe solar cell has sufficient tolerance against gamma-ray exposure with greater than 3 MGy. It was demonstrated that gamma-ray induced current density increased linearly with increasing gamma-ray intensity in the range up to approximately 1.5 kGy/h. In addition, gamma-ray sensitivity was successfully increased by a stack of CdTe solar cells with parallel connection. Furhthermore, it was found that gamma rays with approximately 0.1 Gy/h was detected by the CdTe solar cells.