These mechanisms have been explored through several superlattices where the composition of the material starts with fairly good TE properties, such as PbTe/PbSe [58,59], Bi2Te3/Sb3Te3 [15,58], Si/Ge [60,61] and Bi/Sb [62],organic/organic [63]. As can be seen from these examples, the use of superlattice structures reduces thermal conductivity, resulting in increased ZT values
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