Lattice matched In_0.52Al_0.48As window layersfor InP solar cells

摘要

The authors investigate the effect of a wide-bandgaplattice-matched In_0.52Al_0.48As window layer on InPsolar cells. using the numerical code PC-1D. It was found that the useof InAlAs as a window layer significantly enhances the p+nInP cell efficiency, while no appreciable improvement is seen forn+p cells. Cell efficiencies as high as 23% could be achievedwith a 10 nm thick window layer. The performance enhancement in p+n cells is due to the energy discontinuity at the heterojunction.The InAlAs window layer acts as a minority carrier mirror and confinesthe minority carriers in the cell emitter region