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Indium(III) selenide

Indium(III) selenide
IUPAC name	Indium(III) selenide
Other names	indium selenide, indium sesquiselenide
Identifiers
CAS number	12056-07-4
Properties
Molecular formula	In₂Se₃
Molar mass	466.516 g/mol
Appearance	black crystalline solid
Density	5.80g/cm³
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references

Indium(III) selenide is a compound of indium and selenium. It has potential for use in photovoltaic devices and it has been the subject of extensive research. The two most common forms α- and β- have defect wurtzite structures, however there are five known forms (α, β, γ, δ, κ)^[1] The α- β phase transition is accompanied by a change from metallic conduction. ^[2] The band-gap of γ-In₂Se₃ is approximately 1.9 eV. The crystalline form of a sample can depend on the method of production, for example thin films of pure γ-In₂Se₃ have been produced from trimethylindium, InMe₃, and hydrogen selenide, H₂Se, using MOCVD techniques ^[3]