Silicon-tin or SiSn, is in general a term used for an alloy of the form Si(1-x)Snx.

The molecular ratio of tin in silicon can vary based on the fabrication methods or doping conditions.

In 2015, Hussain et al. experimentally verified the tuning of band gap associated with the diffusion of tin using homogeneous, abrupt p-n junction diodes.

[8][9] Sn has the same valency and electronegativity as silicon and can be found in the diamond cubic crystal structure (α-Sn).

[14] Group-IV alloys containing Sn have the potential for high-efficiency thermoelectric energy conversion.