Pmax reduces 4% from BOL to EOL in GaInP/Ge and Ge and 10% for GaAs solar cells.
The 3J GaInP/GaAs/Ge cell exhibited a 12% power loss between BOL and EOL.
TCAD modeling is used to explain the losses in GaAs solar cells (most damaged cell).
The results from 1J solar cells correlate well with those of 3J solar cells.