Indium(III) selenide - Misplaced Pages

Indium(III) selenide
Names
IUPAC name Indium(III) selenide
Other names indium selenide, indium sesquiselenide
Identifiers
CAS Number	12056-07-4
3D model (JSmol)	Interactive image
ChemSpider	145480
ECHA InfoCard	100.031.821
EC Number	235-016-9
PubChem CID	166055
CompTox Dashboard (EPA)	DTXSID00923467
InChI InChI=1S/2In.3Se/q2+3;3-2Key: AKUCEXGLFUSJCD-UHFFFAOYSA-N
SMILES ....
Properties
Chemical formula	In₂Se₃
Molar mass	466.516 g/mol
Appearance	black crystalline solid
Density	5.80 g/cm³
Hazards
GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H301, H331, H373, H410
Precautionary statements	P260, P261, P264, P270, P271, P273, P301+P316, P304+P340, P316, P319, P321, P330, P391, P403+P233, P405, P501
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). N verify (what is ?) Infobox references

Chemical compound

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. The α-β phase transition is accompanied by a change in electrical conductivity. The band gap of γ-In₂Se₃ is approximately 1.9 eV.

Preparation

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 H₂Se + 2 In(CH₃)₃ → In₂Se₃ + 6 CH₄

A conventional route entails heating the elements in a sealed tube:

3 Se + 2 In → In₂Se₃

General references

WebElements

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

Footnotes

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
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
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
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.