A two-terminal tandem solar cell is provided. The inclusion of
thin (few nm-thick) narrow band-gap InGaAs quantum wells in the
intrinsic (i) region of the conventional p-i-n GaAs solar cell extends
the photo-absorption of the conventional GaInP/GaAs tandem cell toward
the infrared. Beginning-of-Life efficiencies in excess of 30% are
predicted. Modeling data indicate end-of-life efficiency of these
cells will exceed 25% AM0.
