Enhancing the Thermoelectric Performance of GeSb₄Te₇ Compounds via Alloying Se.

ABSTRACT: Ge-Sb-Te compounds (GST), the well-known phase-change materials, are considered to be promising thermoelectric (TE) materials due to their decent thermoelectric performance. While Ge₂Sb₂Te₅ and GeSb₂Te₄ have been extensively studied, the TE performance of GeSb₄Te₇ has not been well explored. Reducing the excessive carrier concentration is crucial to improving TE performance for GeSb₄Te₇. In this work, we synthesize a series of Se-alloyed GeSb₄Te₇ compounds and systematically investigate their structures and transport properties. Raman analysis reveals that Se alloying introduces a new vibrational mode of GeSe₂, enhancing the interatomic interaction forces with

SUBMITTER: Wang S 

PROVIDER: S-EPMC10180192 | biostudies-literature | 2023 Apr

REPOSITORIES: biostudies-literature