Indium(III) selenide is a compound of indium and selenium. It has potential for use in photovoltaic devices and has been the subject of extensive research. The two most common phases, α and β, have a layered structure, while γ has a "defect wurtzite structure." 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.[2] The band gap of γ-In2Se3 is approximately 1.9 eV.

Indium(III) selenide
Names
IUPAC name
Indium(III) selenide
Other names
indium selenide, indium sesquiselenide
Identifiers
ECHA InfoCard 100.031.821 Edit this at Wikidata
Properties
In2Se3
Molar mass 466.516 g/mol
Appearance black crystalline solid
Density 5.80 g/cm³
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Preparation

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The method of production influences the polymorph generated. For example, thin films of pure γ-In2Se3 have been produced from trimethylindium (InMe3) and hydrogen selenide via MOCVD techniques.[3]

3 H2Se + 2 In(CH3)3 → In2Se3 + 6 CH4

A conventional route entails heating the elements in a seal-tube:[4]

3 Se + 2 In → In2Se3

See also

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General references

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Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 978-0-08-037941-8.

Footnotes

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  1. ^ Crystal structure of κ-In2Se3. Jasinski, J.; Swider, W.; Washburn, J.; Liliental-Weber, Z.; Chaiken, A.; Nauka, K.; Gibson, G. A.; Yang, C. C. Applied Physics Letters, Volume 81, Issue 23, id. 4356 (2002) doi:10.1063/1.1526925
  2. ^ Some Electrical and Optical Properties of In2Se3 D. Bidjin, S. Popovi, B. Elustka Physica Status Solidi A Volume 6, Issue 1, Pages 295 – 299 doi:10.1002/pssa.2210060133
  3. ^ Growth of single-phase In2Se3 by using metal organic chemical vapor deposition with dual-source precursors Chang, K. J.; Lahn, S. M.; Chang, J. Y. Applied Physics Letters, Volume 89, Issue 18, id. 182118 (3 pages) (2006). doi:10.1063/1.2382742
  4. ^ O. E. Donges (1963). "Indium Selenides and Tellurides". In G. Brauer (ed.). Handbook of Preparative Inorganic Chemistry, 2nd Ed. Vol. 2pages=865. NY, NY: Academic Press.
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