What is it about?
GeSn alloys with small band gaps have been synthesized by reactions of trigermane and stannane on Si substrates. The very small band gaps are achieved by increasing the Sn content up to 30%, and measured with spectroscopic ellipsometry
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Perspectives
This work is potentially important because it demonstrates that group-IV alloys with band gaps in the mid-IR region of the spectrum are feasible, suggesting a possible alternative to III-V and II-VI compounds.
Jose Menendez
Arizona State University
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This page is a summary of: Mid-infrared (3–8 μm) Ge1−ySny alloys (0.15 < y < 0.30): Synthesis, structural, and optical properties, Applied Physics Letters, May 2019, American Institute of Physics,
DOI: 10.1063/1.5100275.
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