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Product Code M2136C1-500mg
Price $286 ex. VAT

Low price, high purity 2D metal indium(III) selenide powder and crystals

For the development of next-generation electronics, optoelectronics, and nanotechnology


Technical Data | MSDS | Structure | Literature and Reviews | Related Products | Resources and Support


Indium(III) selenide (In2Se3), CAS number 12056-07-4, belongs to the A2IIIB3VI family, and it occurs as several different crystal structures and phases (α, β, γ, δ, and κ). Among those phases, α, β, γ-In2Se3 are semiconducting in nature with layered structures held together via van der Waals. Strong intra-layer chemical valence bonding and weak inter-layer interactions give rise to highly anisotropic structural, electrical, optical, and mechanical properties. This also makes it possible to obtain 2D In2Se3 nanosheets by scaling down to few- or mono-layer.

High Purity Indium(III) Selenide (In2Se3)

High Purity

High purity ≥99.999% Indium(III) Selenide(In2Se3) Crystal

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Low price 12056-07-4

Low price

Low price Indium(III) Selenide (In2Se3)

12056-07-4 Powder & Crystal forms

Powder & Crystal

Available in Powder & Crystal forms

Among them, α-In2Se3 and β-In2Se3 have been the most-studied phases. However, α-In2Se3 and β-In2Se3 phases share the same rhombohedral crystal structure. Normally, the β-In2Se3 phase only exists at elevated temperatures in bulk single crystals. However, at room temperature it persists in thin layers. This makes it possible for multi-level phase-change memory in a single material system

Few-to-monolayer In2Se3 nanosheets can be obtained through liquid exfoliation of high-purity indium(III) selenide powder - In2Se3. 2D nanosheets and nanoparticles are more compatible with conventional micro-fabrication techniques and they are solution-processable. This makes it easier to build complex structures for advanced electronic and optoelectronic devices

We supply low price indium(III) selenide in powder and crystal forms for a range of applications.

Indium(III) selenide powder

Indium(III) Selenide Powder

Can be used for preparation of indium(III) selenide nanoplates and ultrathin films

Sold by weight

≥99.995% purity

From £220

Indium(III) selenide crystal

Indium(III) Selenide Crystals by Size

Can be used to produce single or few-layer indium(III) selenide sheets via mechanical or liquid exfoliation

Small (≥10 mm2) or medium (≥25 mm2) crystals available*

≥99.999% purity

From £520

*Typical representative size, areas/dimensions may vary

Bulk single indium(III) selenide crystal is most commonly used as sources from which single or few-layer sheets can be obtained via either mechanical or liquid exfoliation. Single indium(III) selenide crystal or films produced from such crystals are suitable for study using atomic force microscopy or transmission electron microscopy.

Indium(III) selenide powder can also be used to prepare In2Se3 nanosheets and nanoparticles by liquid-exfoliation (normally assisted by sonication), especially when it is the case of foreign elements such as lithium or sodium cations being inserted between layers by the process of intercalation. Liquid exfoliation can provide mass production of such products.

Technical Data

CAS Number 12056-07-4
Chemical Formula In2Se3
Molecular Weight 466.52 g/mol
Bandgap 1.2 - 3.0 eV
Preparation Synthetic - Chemical Vapour Transport (CVT)
Structure Rhombohedral
Electronic Properties 2D semiconductor
Melting Point 890 °C
Colour Black
Synonyms Indium(III) Selenide, Diindium triselenide
Classification / Family Transition metal dichalcogenides (TMDCs), 2D Semiconductor materials, Charge Density Wave (CDW), Hydrogen Revolution Reactions (HER), Nano-electronics, Nano-photonics, Photovoltaic, Materials science

Product Details

Form Purity
Powder ≥99.995%
Crystal ≥99.999%

Pricing Table

Product Code Form Size/Weight* Price
M2136C1 Powder 500 mg £220
M2136C1 Powder 1 g £350
M2136A10 Crystal Small (≥10 mm2) £520 ea.
M2136A25 Crystal Medium (≥25 mm2) £850 ea.

*typical representative size, areas/dimensions may vary

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MSDS Documents


Indium (III) selenide powder MSDSIndium(III) selenide powder

Indium (III) selenide crystal MSDSIndium(III) selenide crystal

Structure of Indium(III) Selenide


Indium selenide (In2Se3) belongs to the A2IIIB3VI family, and it occurs as several different crystal structures and phases (α, β, γ, δ, and κ). Among those phases, α, β, γ-In2Se3 are semiconducting in nature with layered structures held together via van der Waals. Strong intra-layer chemical valence bonding and weak inter-layer interactions give rise to highly anisotropic structural, electrical, optical, and mechanical properties. This also makes it possible to obtain 2D In2Se3 nanosheets by scaling down to few- or mono-layer.

α-In2Se3 and β-In2Se3 phases share the same rhombohedral crystal structure. The primitive unit cell contains three layers, each consisting of five covalently-bonded, monoatomic sheets in the sequence of Se–In–Se–In–Se. For α-In2Se3, the outer Se-atoms in each layer are aligned, whereas in β-In2Se3 they are located at the interstitial sites of the Se-atoms in the neighbouring layers.

indium(III) selenide - In2Se3 crystal structure
Top and side view of single-layer indium(III) selenide (In2Se3)

Literature and Reviews


  • Strong quantum confinement effect in the optical properties of ultrathin α-In2Se3, Adv. Opt. Mater., J. Quereda et al., 14 (12), 1939-1943 (2016); DOI: 10.1002/adom.201600365.
  • Crystalline–Crystalline Phase Transformation in Two-Dimensional In2Se3 Thin Layers, X. Tao et al., Nano Lett., 13 (8), 3501–3505 (2013); DOI: 10.1021/nl400888p.
  • Controlled Synthesis of High-Quality Monolayered α-In2Se3 via Physical Vapor Deposition, J. Zhou et al., Nano Lett., 15 (10), 6400–6405 (2015); DOI: 10.1021/acs.nanolett.5b01590.

We stock a wide range of 2D materials available to purchase online. Please contact us if you cannot find what you are looking for.

Resources and Support


Viscoelastic Transfer of 2D Material Using PDMS

Viscoelastic transfer using polydimethylsiloxane (PDMS) stamps is one of the methods used for the deterministic placement of 2D materials and the fabrication of van der Waals heterostructures. It relies on the viscoelasticity of PDMS, which behaves as an elastic solid on short time scales, but as a viscous fluid on long time scales.

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