Annealing of irradiation damage in epitaxial InP homojunction solar cells

Changes in the performance of epitaxial InP homojunction solar cells after irradiation and annealing are discussed, for 1 MeV electron and 1 MeV proton irradiation. Material samples have been investigated in order to characterise the irradiation induced defects. Admittance spectroscopy has identified a defect, HD1, which cannot be observed by DLTS and which is believed to influence carrier concentration in the p-type material. The relationship of the defect characterisation to thermal annealing of the cells, both at room and elevated temperature, is considered.<>