Effects of 10 MeV Proton Irradiation of III-V Solar Cells

E. YACCUZZI; M. OCHOA; M. BARRERA; E. BARRIGÓN; S. RODRÍGUEZ; M.L. IBARRA; J. GARCÍA; E.M. GODFRIN; M. ALURRALDE; C. ALGORA; I. REY STOLLE; J. PLÁ

Hamburgo

Conferencia; European Photovoltaic Solar Energy Conference and Exhibition; 2015

In this work we present our latest results and analysis of a 10 MeV proton irradiation experiment performed on III-V solar cells. A set of representative devices were irradiated for different fluences, including lattice matched GaInP/GaInAs/Ge triple junction, GaInP/Ge double junction, and GaAs and Ge single junction solar cells. The methodology applied included the irradiation of two devices of each type; for a better control of the measurements, non-irradiated devices with the same characteristics of those irradiated were used as reference. The devices were monitored before and after each exposure by in-situ characterization of the electrical response under dark and under illumination using a solar simulator connected to the irradiation chamber through a borosilicate glass window. Ex-situ characterization techniques included dark and 1 sun AM0 illumination I-V curve and external quantum efficiency measurements. Furthermore, results of the numerical simulation of devices with D-AMPS-1D code are presented in order to give a physical interpretation of the results. DLTS spectroscopy preliminary results for single junction GaAs cells are also presented.