Work

The promising thermoelectric performance of newly synthesized bulk SrCu2GeSe4 and BaCu2SnSe4 associated with superior band degeneracy

Year: 2021

Type: article

Abstract: The thermoelectric transport properties with the variations of carrier concentration, temperature and strain of bulk SrCu2GeSe4 and BaCu2SnSe4 are studied by using the first-principles calculations with the Boltzmann transport equation. A multi-valley degenerate valence band is gained for BaCu2SnSe4, which is responsible for its comparatively high power factor. The power factor of p-type doped SrCu2GeSe4 is enhanced to 35 μW cm−1 K−2 when applying a 2% tensile strain at 300 K. The ZT values of 1.01 (0.94) and 1.60 (1.36) are acquired at 700 K for n- and p-type BaCu2SnSe4 (SrCu2GeSe4), respectively, predicting that both the two compounds are hopeful thermoelectric materials.

Source: Applied Physics Express

DOI: 10.35848/1882-0786/abed90

Authors: Cong Wang, Guangqian Ding

Institutions: Hubei University of Arts and Science, Chongqing University of Posts and Telecommunications

Language: English

Topic: Advanced Thermoelectric Materials and Devices

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: bronze

Funder: National Natural Science Foundation of China

Award: G8529421181