Synthesis, Crystal Structure, and Physical Properties of BaSnS2

Phase-pure BaSnS2, with space group P2(1)/c, is synthesized, and the structural and physical properties are investigated. Thermal properties and optical measurements are reported for the first time. The Debye temperature and Sommerfeld coefficient are obtained from temperature-dependent heat capacity measurements, the latter indicating that BaSnS2 is an electrical insulator. A direct bandgap of 2.4 eV is obtained from diffuse reflectance and photoluminescence spectroscopy. The findings herein lay the foundation for understanding the physical properties of this material and are part of a continuing effort to investigate previously unexplored ternary chalcogenides.

Automated summary

Phase-pure BaSnS2 with space group P2(1)/c was synthesized and investigated for its structural and physical properties. Thermal and optical measurements were reported for the first time, revealing BaSnS2 as an electrical insulator with a direct bandgap of 2.4 eV.