Effective Coating for High Efficiency Triple Junction Solar Cells

An important field to improve solar cell efficiency is the optimization of the antireflection coating (ARC) to allow more light to be converted; from a theoretical point of view this could increase the solar cell efficiency of 0.5%. Different ARC designs have been investigated, the most promising approaches are based on multi layers or gradient index approaches. These approaches have been theoretically and experimentally optimized to increase the photocurrent in the spectral range 300–1880 nm. Experimental results show that the solar cell efficiency can be increased of 0.5% both on thin and standard CESI space solar cells having 30% BOL efficiency.