Recent Progress in Epitaxial Lift-Off Solar Cells

MicroLink Devices has developed two-terminal monolithic three-junction (3J) GaInP/GaAs/GaInAs epitaxial liftoff (ELO) solar cells with certified 37.75 ± 0.53% AM1.5G 1-Sun power conversion efficiency at 25°C. Additionally, MicroLink is developing two-terminal monolithic four-junction (4J) ELO solar cells based on GaInP/GaAs/GaInAs/GaInAs subcells with a peak preliminary AM0 1-Sun efficiency of 34.31%. All of these ELO solar cells were manufactured entirely with production tools and processes on reusable 150 mm diameter GaAs substrates.