Improved large-area, two-terminal InP/Ga/sub 0.47/In/sub 0.53/As tandem solar cells

Progress in the development of high-efficiency, large-area, two-terminal InP/Ga/sub 0.47/In/sub 0.53/AS tandem solar cells is reported. Five tandem cells with total areas of /spl sim/4 cm/sup 2/, with 1-sun AM0 efficiencies ranging from 19.4% to 21.1%, were prepared for the STRV-1 satellite solar cell flight experiment. Additionally, an /spl sim/1 cm/sup 2/ tandem cell with a 1-sun AM0 efficiency of 22.2% has been confirmed. Possible further improvements and performance potential are discussed.