The characteristics of solar cells exposed to γ-radiation

We have investigated the characteristics of solar cells exposed to γ-radiation from the standpoint of developing such gamma cells utilizing nuclear spent fuels. The examination was performed for three representative types of solar cells, i.e. amorphous, monocrystalline and polycrystalline types. These solar cells were remotely irradiated using a highly intensive 60Co γ-source instead of spent fuels, and the induced current and voltage were measured. Corresponding experiments were also carried out after covering the cell surface with either plastic or CsI(Tl) scintillators. The angular characteristics and radiation damage were examined, and the effectiveness of three-layered solar cells on induced current were clarified.