Indium(III) selenide

{{chembox

| Verifiedfields = changed

| verifiedrevid = 431675994

| ImageFile =

| ImageSize =

| IUPACName = Indium(III) selenide

| OtherNames = indium selenide, indium sesquiselenide

|Section1={{Chembox Identifiers

| CASNo_Ref = {{cascite|correct|CAS}}

| CASNo = 12056-07-4

| ChemSpiderID = 145480

| EC_number = 235-016-9

| PubChem = 166055

| StdInChI=1S/2In.3Se/q2*+3;3*-2

| StdInChIKey = AKUCEXGLFUSJCD-UHFFFAOYSA-N

| SMILES = [Se-2].[Se-2].[Se-2].[In+3].[In+3]

}}

|Section2={{Chembox Properties

| Formula = In₂Se₃

| MolarMass = 466.516 g/mol

| Appearance = black crystalline solid

| Density = 5.80 g/cm³

| MeltingPtC =

| BoilingPt =

| Solubility =

}}

|Section3={{Chembox Hazards

| GHS_ref=[https://pubchem.ncbi.nlm.nih.gov/compound/166055#section=Safety-and-Hazards]

| GHSPictograms = {{GHS06}}{{GHS08}}{{GHS09}}

| GHSSignalWord = Danger

| HPhrases = {{H-phrases|301|331|373|410}}

| PPhrases = {{P-phrases|260|261|264|270|271|273|301+316|304+340|316|319|321|330|391|403+233|405|501}}

| MainHazards =

}}

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.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}} The α-β phase transition is accompanied by a change in electrical conductivity.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}} 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.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}}

:{{chem2|3 H2Se + 2 In(CH3)3 -> In2Se3 + 6 CH4}}

A conventional route entails heating the elements in a sealed tube:{{cite book|author1=O. E. Donges|chapter=Indium Selenides and Tellurides|title=Handbook of Preparative Inorganic Chemistry, 2nd Ed. |editor=G. Brauer|publisher=Academic Press|year=1963|place=NY, NY|volume=2pages=865}}

:{{chem2|3 Se + 2 In -> In2Se3}}