The Spectral Conversion Layer Incorporated with Species of LDS and UC Phosphors on Single-Junction GaAs Solar Cells to Enhance Photovoltaic Performance

Abstract

In this study, photovoltaic performance enhancements of single-junction GaAs solar Cells using a spectral conversion layer comprising of various species of luminescent down-shifting (LDS) and up conversion (UC) phosphors deposition by spin-on film method are characterized. The peak luminescent wavelength of proposed species of LDS and UC phosphors was 512 nm and 675 nm, respectively. Optical reflectance and external quantum efficiency responses are used to examine LDS and UC effects on the cells. The photovoltaic performance enhancements are confirmed by photovoltaic current density-voltage measurements under AM 1.5G solar simulation. An impressive efficiency of 23.83% of the cell coated with a spectral conversion layer comprising of both species of LDS and up UC phosphors, which exceeding that 23.72% of cell with species of UC, 23.20% of cell with species of LDS and 19.36 of cell without a spectral conversion layer.