Comparison of Two-Species Luminescant Down-Shifting Phosphors Spectral Conversion Layers on Efficiency Enhancement of Silicon Solar Cells Using Spin Coating Process

In this work, the efficiency of silicon solar cell enhanced by a spectral conversion layer comprising of two-species luminescent down-shifting (LDS) phosphors using spin coating process was demonstrated. Two species of LDS phosphors using co-mixed in silicate solution and single coating, or two species of LDS phosphors separately mixing in silicate solution and double coating, on the silicon solar cells were proposed. The efficiency enhancements of 25.83% (from 11.15% to 14.03%) for the cell with the separate mixing and double coating and 14.0% (from 11.14% to 12.70%) for the cell with co-mixing and one coating were obtained, compared to the reference silicon solar cells.