Efficiency Improvement of Silicon Solar Cell Via Luminescent Dye-Labeled Polymer Doped in EVA Encapsulation Layer

26th European Photovoltaic Solar Energy Conference and Exhibition; 2231-2232
Owning to significantly lower external quantum yield (EQE) of commercial solar cells in ultra-violet region (300-400nm), a luminescent down-shifting (LDS) technology has been proposed for improving the poor spectral response of solar cells to ultra-violet (UV) light. To enhance the luminescence resulting in improving the poor spectral response of solar cells, the concentration of luminescent materials doped in poly(ethylene-co-vinyl acetate) (EVA) encapsulation layer should be increased as high as possible before the concentration quenching of luminescent materials occurs. However, as the concentration of luminescent materials increases, the encapsulation layer may encounter the miscibility problem causing phase separation between luminescent materials and EVA resulting in significant scattering loss of incident sunlight. By taking advantage of the good miscibility of PCL in EVA, in this study, a series of pyrene labeled poly(caprolactone) (PCL-PY) polymer have been synthesized for efficiency improvement of silicon solar cell via LDS effect of PCL-PY doped in EVA encapsulation layer.