Accelerated Aging Tests of High Concentration Multijunction Solar Cells

High concentration multi-junction solar cells are starting to be commercialized. However, few studies about their reliability have been carried out. In this paper, we present the results of accelerated aging tests performed on Sanan high concentration solar cells. It is found that the relative power degradations of tested samples are within 10%. For comparison, commercial cells from Emcore are also tested under similar conditions, and the results are similar with that from Sanan. The tested electrical insulations of these cells before and after thermal cycling test also meet requirements from IEC 62108.