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Product Code M2307C1-500mg
Price £220 ex. VAT

Low price, high purity 2D metal germanium diselenide powder and crystal

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

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

Germanium diselenide (GeSe2), CAS number 12065-11-1, belongs to the group IV layered transition metal dichalcogenides (TMDCs). 2D GeSe2 with a direct wide bandgap (2.74 eV) is of great research interest for its potential applications in ultraviolet (UV) detection. Compared to the bulk structure, the monolayer GeSe2 exhibits the small average effective mass and significant anisotropy in optical absorption, indicating potential optoelectronic applications Photodetectors based on GeSe2 exhibit a highly polarization-sensitive photo response in short wave region due to the optical absorption anisotropy induced by in-plane anisotropy in crystal structure.

High Purity Germanium Diselenide

High Purity

High purity Gallium Sulfide ≥99.995% powder

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Low price 12065-11-1

Low price

Low price Germanium Diselenide

powder and crystals Germanium Diselenide

Different Forms

Available in powder and crystals

Exfoliated GeSe2 nanoflakes also show great stability in ambient air.

We supply low price germanium diselenide in several different forms for a range of applications.

Germanium diselenide powder

Germanium Diselenide Powder

Can be used for preparation of germanium diselenide nanoplates and ultrathin films

Sold by weight

≥99.995% purity

From £220

Germanium diselenide crystal

Germanium Diselenide by Size

Can be used to produce single or few-layer germanium diselenide sheets via mechanical or liquid exfoliation

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

≥99.999% purity

From £680

*Typical representative size, areas/dimensions may vary

Bulk single germanium diselenide crystal is most commonly used as sources from which single or few-layer sheets can be obtained via either mechanical or liquid exfoliation. 

Germanium diselenide powder can also be used to prepare GeSe2 nanosheets and nanoparticles by liquid-exfoliation (normally assisted by sonication). 

Technical Data

CAS Number 12065-11-1
Chemical Formula GeSe2
Molecular Weight 230.6 g/mol
Bandgap 2.74 eV
Preparation Synthetic - Chemical Vapour Transport (CVT)
Structure Tetragonal
Electronic Properties 2D semiconductor
Melting Point 707 °C (lit.)
Colour Orange
Synonyms Germanium(IV) selenide, Bis(selanylidene)germane
Classification / Family Transition metal dichalcogenides (TMDCs), 2D semiconductor 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
M2307C1 Powder 500 mg £220
M2307C1 Powder 1 g £350
M2307A10 Crystal Small (≥10 mm2) £680 ea.
M2307A25 Crystal Medium (≥25 mm2) £1200 ea.

*typical representative size, areas/dimensions may vary

Shipping is free for qualifying orders.

MSDS Documents

Germanium diselenide powder MSDSGermanium diselenide powder

Germanium diselenide crystal MSDSGermanium diselenide crystal

Structure of Germanium Diselenide

GeSe2 crystallizes in the tetragonal I-42d space group. The structure is two-dimensional and consists of two GeSe2 sheets oriented in the (0, 0, 1) direction. Ge4+ is bonded to four equivalent Se2- atoms to form corner-sharing GeSe4 tetrahedra. All Ge–Se bond lengths are 2.40 Å. S2- is bonded in a water-like geometry to two equivalent Ge4+ atoms.

gese2 crystal structure

Tetragonal GeSe2 is considered a structure of high symmetry: a GeSe2 monolayer in which all tetrahedra are connected via corners, resulting in a much more ordered arrangement. This structure corresponds to a single slab of the high-pressure, layer-structured, tetragonal HgI2-type phase.

GeSe2 crystal structure - germanium diselenide
Top and side view of single-layer germanium disulfide (GeSe2)

Literature and Reviews

  • Ab initio molecular-dynamics study of the structural, vibrational, and electronic properties of glassy GeSe2, M. Cobb et al., Phys. Rev. B, 54 (17), 12162 (1996); DOI: 10.1103/PhysRevB.54.12162.
  • Structural and electronic properties of glassy GeSe2 surfaces, X. Zhang et al., Phys. Rev. B, 62 (23), 15695 (2000); DOI: 10.1103/PhysRevB.62.15695.
  • Three-Dimensional Hierarchical GeSe2 Nanostructures for High Performance Flexible All-Solid-State Supercapacitors, X. Wang et al., Adv. Mater., 25 (10), 1479-1486 (2013); DOI: 10.1002/adma.201204063.

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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