Indium(III) Selenide (In2Se3) Powder and Crystal
Low price, high purity 2D metal indium(III) selenide powder and crystals
For the development of next-generation electronics, optoelectronics, and nanotechnology
Indium(III) 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.
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
Can be used for preparation of indium(III) selenide nanoplates and ultrathin films
Sold by weight
≥99.995% purity
From £200

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 £480
*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.
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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.
Key Product Data
- High purity, low price indium(III) selenide
- Available as a powder or as individual crystals
- Can be used to produce single or few-layer sheets
- Free worldwide shipping on qualifying orders
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.

Properties of Indium(III) Selenide
After exfoliation of crystals or powder, indium(III) selenide typically has the following properties:
- Rhombohedral structure (space group: R3m)
- Highly anisotropic structural, electrical, optical, and mechanical properties.
- α-In2Se3 and β-In2Se3 phases share the same rhombohedral crystal structure
- α-In2Se3 is the stable form at room temperature and β-In2Se3 phase only exists at elevated temperatures in bulk single crystals
Applications of Indium(III) Selenide
Indium(III) selenide single crystals can be used to prepare monolayer and few-layer In2Se3 by mechanical or liquid exfoliation. Indium(III) selenide powder is suitable for liquid chemical exfoliation to prepare In2Se3 nanosheets and nanoparticles down to few-layer films.
Indium(III) selenide has been of great research interest and extensively studied to explore its applications in solar energy harvesting, non-volatile phase change memory and optoelectronic devices. In2Se3 is particularly desired for photodetection due to its optimum direct-band gap (1.3 eV), efficient absorption and great photon sensitivity. With a layered structure, exfoliated nanosheets from Indium(III) selenide (In2Se3) powder offer new opportunities for practical applications in photovoltaics, photodetectors, capacitors, phase change memory, ionic battery, and chemicals sensory devices.
Indium(III) selenide has been of great research interest and extensively studied to explore its applications in solar energy harvesting, nonvolatile phase change memory and optoelectronic devices. In2Se3 is particularly desired for photodetection due to its optimum direct-band gap (1.3 eV), efficient absorption and great photon sensitivity.
With a layered structure, exfoliated nanosheets from Indium(III) selenide (In2Se3) powder offer new opportunities for practical applications in photovoltaics, photodetectors, capacitors, phase change memory, ionic battery, and chemicals sensory devices.
Processing Indium(III) Selenide
Viscoelastic transfer using PDMS
Literature and Reviews
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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.
- Extraordinary Photoresponse in Two-Dimensional In2Se3 Nanosheets, R. Jacobs-Gedrim et al., ACS Nano, 8 (11), 514–521 (2014); DIO: 10.1021/nn405037s.
- Prediction of intrinsic two-dimensional ferroelectrics in In2Se3 and other III2-VI3 van der Waals materials, W. Ding et al., Nat. Commun., 8:14956 (2017); DOI: 10.1038/ncomms14956.
- Room temperature in-plane ferroelectricity in van der Waals In2Se3, C. Zheng et al., Sci. Adv., 4 (7) eaar7720 (2018); DOI: 10.1126/sciadv.aar7720
- Indium selenide (In2Se3) thin film for phase-change memory, H. Lee et al., Mater. Sci& Eng., B 119, 196–201 (2005); doi: 10.1016/j.mseb.2005.02.060.
- Structural, optical and electrical properties of In2Se3 thin films formed by annealing chemically deposited Se and vacuum evaporated In stack layers, B. Krishnan et al., Appl. Surf. Sci., 191(1-4), 138-147 (2002); DOI: 10.1016/S0169-4332(02)00172-1.
- Thickness-Dependent Dielectric Constant of Few-Layer In2Se3 Nanoflakes, D. Wu et al., Nano Lett., 15, 8136−8140 (2015); DOI: 10.1021/acs.nanolett.5b03575.
- Phototransistor based on single In2Se3 nanosheets, Q. Li et al., Nanoscale, 6, 14538 (2014); DOI: 10.1039/c4nr04404e.
- High-performance and flexible photodetectors based on chemical vapor deposition grown two-dimensional In2Se3 nanosheets, W. Feng et al., Nanotechnology 29, 445205 (2018); doi: 10.1088/1361-6528/aadc73.
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% |
MSDS Documents
Pricing Table
Product Code | Form | Size/Weight* | Price |
M2136C1 | Powder | 500 mg | £200 |
M2136C1 | Powder | 1 g | £320 |
M2136A10 | Crystal | Small (≥10 mm2) | £480 ea. |
M2136A25 | Crystal | Medium (≥25 mm2) | £760 ea. |
*typical representative size, areas/dimensions may vary
To the best of our knowledge the information provided here is accurate. However, Ossila assume no liability for the accuracy of this page. The values provided are typical at the time of manufacture and may vary over time and from batch to batch. All products are for laboratory and research and development use only, and may not be used for any other purpose including health care, pharmaceuticals, cosmetics, food or commercial applications.