Abstract
Solar cells based on Sb2(S1−x,Sex)3 ternary compounds have shown the highest reported efficiency value compared to their Sb2Se3 and Sb2S3 counterparts in antimony chalcogenide technology. However, the reported record efficiencies for these new emergent solar cells are still well below the theoretical values according to their bandgap value or for the traditional solar cells in the thin film technology. This article presents an analysis regarding the optimal composition that guarantees an increase in efficiency in the manufacture of Sby(S1−x,Sex)3 solar cells, as well as the proposal of a new synthesis method that allows obtaining the ternary compound with the calculated optimal composition. From theoretical considerations, a composition of Sb1.85(S0.63,Se0.42)3 is obtained. This composition is equivalent to optimal values Se/(S + Se) = 0.4 and Sb/(S + Se) = 0.88. The results of the new proposed synthesis method are presented and discussed.
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