Figure S3. Variation of with temperature in Sn1.04-y-xCayInxTe. ZT To test the effect of ratio of co-dopant concentrations in SnTe, we carried out synthesis of a series of samples with varying ratios of and Initially, to the optimized concentration of Ca In. self compensated SnTe (i.e. Sn1.04Te) we added in increasing amounts. We found that at 8 Ca mol % of maximum was achieved. Now, to this composition, we added in increasing Ca, ZT In amounts. We see that at 8 mol % of and 4 mol % of a maximum of 1.65 is achieved Ca In, ZT further confirming the chosen 2:1 ratio was appropriate for the study to gain maximum Ca:In synergistic effect.
Figure S3. Variation of ZT with temperature in Sn1.04-y-xCayInxTe. To test the effect of ratio of co-dopant concentrations in SnTe, we carried out synthesis of a series of samples with varying ratios of Ca and In. Initially, to the optimized concentration of self compensated SnTe (i.e. Sn1.04Te) we added Ca in increasing amounts. We found that at 8 mol % of Ca, maximum ZT was achieved. Now, to this composition, we added In in increasing amounts. We see that at 8 mol % of Ca and 4 mol % of In, a maximum ZT of 1.65 is achieved further confirming the chosen 2:1 Ca:In ratio was appropriate for the study to gain maximum synergistic effect.
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