Self-assembled Sn nanodots were formed on SiO 2 and the crystallinity and Sn composition of a Ge 1−x Sn x polycrystal formed on the Sn nanodots were evaluated. The average diameter of the Sn nanodots was 17.1 nm, and their density was 1.5×10 9 cm −2 . Raman spectroscopy revealed that the crystallinity of Ge 1−x Sn x increased from 52.29% to 86.82% as the Ge deposition temperature increased from 100 °C to 225 °C. However, agglomeration degraded the surface roughness when the Ge deposition temperature was high. By contrast, the Sn composition reduced from 12.84 to 4.78%. For both high Sn composition and a flat surface, lowering the Ge deposition temperature was found to be crucial. The impact of the crystallinity and Sn composition on thermal conductivity was investigated using the time-domain thermoreflectance method. Thermal conductivity increased with the increase in crystallinity, and it reached 2.305 W m −1 K −1 for Ge 1−x Sn x with a crystallinity of 86.82%. Ge 1−x Sn x alloy had lower thermal conductivity than that of Ge at the same crystallinity.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.