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Bottom-Up Synthesis of SnTe-Based Thermoelectric Composites.

ABSTRACT: There is a need for the development of lead-free thermoelectric materials for medium-/high-temperature applications. Here, we report a thiol-free tin telluride (SnTe) precursor that can be thermally decomposed to produce SnTe crystals with sizes ranging from tens to several hundreds of nanometers. We further engineer SnTe-Cu₂SnTe₃ nanocomposites with a homogeneous phase distribution by decomposing the liquid SnTe precursor containing a dispersion of Cu_1.5Te colloidal nanoparticles. The presence of Cu within the SnTe and the segregated semimetallic Cu₂SnTe₃ phase effectively improves the electrical conductivity of SnTe while simultaneously reducing the lattice thermal conductivity without compromising the Seebeck coefficient. Overall, power factors up to 3.63 mW m^-1 K^-2 and thermoelectric figures of merit up to 1.04 are obtained at 823 K, which represent a 167% enhancement compared with pristine SnTe.

SUBMITTER: Nan B

PROVIDER: S-EPMC10197086 | biostudies-literature | 2023 May

REPOSITORIES: biostudies-literature

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Bottom-Up Synthesis of SnTe-Based Thermoelectric Composites.

Nan Bingfei B Song Xuan X Chang Cheng C Xiao Ke K Zhang Yu Y Yang Linlin L Horta Sharona S Li Junshan J Lim Khak Ho KH Ibáñez Maria M Cabot Andreu A

ACS applied materials & interfaces 20230504 19

There is a need for the development of lead-free thermoelectric materials for medium-/high-temperature applications. Here, we report a thiol-free tin telluride (SnTe) precursor that can be thermally decomposed to produce SnTe crystals with sizes ranging from tens to several hundreds of nanometers. We further engineer SnTe-Cu2SnTe3 nanocomposites with a homogeneous phase distribution by decomposing the liquid SnTe precursor containing a dispersion of Cu1.5Te collo ...[more]

PMID: 37141543

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