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Product Code M2206C1-500mg
Price £220 ex. VAT

Low price, high purity 2D metal bismuth 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

Bismuth selenide (Bi2Se3), CAS number 2068-69-8, belongs to group 15 (VA) post-transition metal trichalcogenides (TMTCs). Bi2Seis predicted to be a strong 3D topological insulator* and it has a topologically non-trivial energy gap of 0.3 eV. It has robust and simple surface state consisting of a single Dirac cone at the k = 0 Γ point in the surface Brilloiun zone.

Both the surface and bulk states of Bi2Se3 have a strong tendency toward n-type due to its native n-type defects such as selenium vacancies. 

High Purity Bismuth Selenide

High Purity

≥99.995% purity

Versitile 2068-69-8

Versitile use

Next-generation electronics, optoelectronics, and nanotechnology

Strong 3D topological insulator

Strong 3D topological insulator*

Energy gap of 0.3 eVe

Quick Worldwide shipping

Worldwide shipping

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*Topological insulator is a class of material, in which its bulk is insulating while its surface states are conducting. Topological insulators are new states of quantum matter in which surface states residing in the bulk insulating gap of such systems are protected by time-reversal symmetry. In topological insulator, strong spin-orbit coupling induces non-trivial surface states that are robustly protected against any time reversal perturbations, such as crystal defects and non-magnetic impurities.

We supply low price bismuth selenide in several different forms for a range of applications.

Bismuth selenide powder

Bismuth Selenide Powder

Can be used for preparation of bismuth selenide nanoplates and ultrathin films

Sold by weight

≥99.995% purity

From £350

Bismuth selenide crystals

Bismuth Selenide Crystals by Size

Can be used to produce single or few-layer bismuth 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 bismuth selenide crystals are most commonly used as sources from which single or few-layer sheets can be obtained via either mechanical or liquid exfoliation. Single bismuth selenide crystal or films produced from such crystals are suitable for study using atomic force microscopy or transmission electron microscopy.

Bismuth selenide powder can also be used to prepare Bi2Se3 nanosheets and nanoparticles by liquid-exfoliation (normally assisted by sonication).

Technical Data

CAS Number 2068-69-8
Chemical Formula Bi2Se3
Molecular Weight 654.84 g/mol
Bandgap ~0.3 eV
Preparation Synthetic - Chemical Vapour Transport (CVT)
Structure Rhombohedral
Electronic Properties Topological insulator
Melting Point 710 °C
Colour Dull grey crystal
Synonyms Bismuth(III) selenide
Classification / Family Transition metal trichalcogenides (TMTCs), 3D Topological insulator materials, 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
M2206C1 Powder 500 mg £220
M2206C1 Powder 1 g £350
M2206A10 Crystal Small (≥10 mm2) £520 ea.
M2206A25 Crystal Medium (≥25 mm2) £850 ea.

*Typical representative size, areas/dimensions may vary

Shipping is free for qualifying orders.

MSDS Documents

Bismuth selenide powder MSDSBismuth selenide powder

Bismuth selenide crystal MSDSBismuth selenide crystal

Structure of Bismuth Selenide

Bi2Sehas anisotropic, layered structures in which five atomic layers are covalently bonded to form a quintuple layer with a thickness of ~1 nm. Each quintuple layer has the atomic arrangement with five atomic layers alternating Bi and Se in the sequence of Se-Bi-Se-Bi-Se and each primitive unit cell of Bi2Se3 contains five atoms. The rhombohedral crystal structure of Bi2Se3 consists of hexagonal planes of Bi and Se stacked on top of each other along the z-direction.

Quintuple layers interact weakly through van der Waals interactions.

bismuth selenide-Bi2se3 crystal structure
Top and side view of single-layer bismuth selenide (Bi2Se3).

Literature and Reviews

  • Surface State Transport and Ambipolar Electric Field Effect in Bi2Se3 Nanodevices, H. Steinberg et al., Nano Lett., 10(12), 5032-5036 (2010); doi: 10.1021/nl1032183.
  • Two-Dimensional Transport Induced Linear Magneto-Resistance in Topological Insulator Bi2Se3 Nanoribbons, H. Tang et al., ACS Nano, 5(9), 7510-7516 (2011); doi: 10.1021/nn2024607.
  • Thermal Stability and Anisotropic Sublimation of Two-Dimensional Colloidal Bi2Te3 and Bi2Se3 Nanocrystals, J. Buha et al., Nano Lett., 16, 4217−4223 (2016); DOI: 10.1021/acs.nanolett.6b01116.

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.

Learn more...
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