Bismuth Selenide (Bi2Se3) Powders and Crystal
CAS Number 2068-69-8
2D Materials, Low Dimensional Materials, Materials, Post-Transition Metal Chalcogenides (PTMCs), Transition Metal Chalcogenides (TMCs)Please choose the appropriate MSDS from the list below. Links will open in a new window. If your browser does not support PDFs, you will be prompted to download the file instead.
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). Bi2Se3 is 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
≥99.995% purity
Versitile use
Next-generation electronics, optoelectronics, and nanotechnology
Strong 3D topological insulator*
Energy gap of 0.3 eVe
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Quick and reliable shipping
*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
Can be used for preparation of bismuth selenide nanoplates and ultrathin films
Sold by weight
≥99.995% purity
From £350
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
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MSDS Documents
Structure of Bismuth Selenide
Bi2Se3 has 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.
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.
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