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High peak ZT of ∼0.7 and ∼0.65 at 673 K is obtained for Co 4 Sb 11.86 Se 0.1 Zn 0.04 and Co 4 Sb 11.86 Se 0.1 Sn 0.04 compounds which shows more than 50% enhancement relative to the pristine Co 4 Sb 12 system.
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Karthikeyan et al. (2017) studied this question.
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