Crystal symmetry modification enables high-ranged in-plane thermoelectric performance in n-type SnSe crystals.

ABSTRACT: SnSe crystal has witnessed significant advancements as a promising thermoelectric material over the past decade. Its in-plane direction shows robust mechanical strength for practical thermoelectric applications. Herein, we optimize the in-plane thermoelectric performance of n-type SnSe by crystal symmetry modification. In particular, we find that Te and Mo alloying continuously enhances the crystal symmetry, thereby increasing the carrier mobility to ~ 422 cm²V^-1 s^-1. Simultaneously, the conduction bands converge with the symmetry modification, further improving the electrical transport. Additionally, the lattice thermal conductivity is limited to ~ 1.1 W m^-1 K^-1 due to the softness of both acoustic and optical branches. Consequently,

SUBMITTER: Shi H 

PROVIDER: S-EPMC11842792 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature