It has potential for use in photovoltaic devices and has been the subject of extensive research.

In all, five polymorphs are known: α, β, γ, δ, κ.

[1] The α-β phase transition is accompanied by a change in electrical conductivity.

For example, thin films of pure γ-In2Se3 have been produced from trimethylindium (InMe3) and hydrogen selenide via MOCVD techniques.

[3] A conventional route entails heating the elements in a sealed tube:[4] Greenwood, Norman N.; Earnshaw, Alan (1997).