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Germanium Disulfide (GeS2) Powder and Crystals

CAS Number 12025-34-2

2D Semiconductor Materials, Anode Materials, Low Dimensional Materials

Product Code M2305C1-500mg
Price $275 ex. VAT

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

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

Germanium disulfide (GeS2) belongs to the group IV layered transition metal dichalcogenides (TMDCs).  A promising anisotropic semiconductor with unique vdW structure, germanium disulfide is currently of particular research interest into its potential in energy storage applications such as solid state batteries.

Unlike SnS2 or SnSe2 which has a simple 1T structure with the central Sn atoms are octahedrally coordinated by six outer S/Se atoms, GeS2 has more complex structure. GeS2 has a layered structure with tetrahedral coordination with complex structural patterns, containing 48 atoms in the bulk unit cell (space group P21/c). In these structures, each layer is composed of eight distorted, edge- and corner-sharing tetrahedral [GeS4 ] motifs in one unit cell.

High Purity Germanium Disulfide

High Purity

High purity Germanium Disulfide ≥99.995% powder

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Low price‎‎ 12025-34-2

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Low price Germanium Disulfide

powder and crystals Germanium Disulfide

Different Forms

Available in powder and crystals

Nanoflakes of 2D GeS2 with a thickness of 4.2 nm achieved via mechanical exfoliation is expected to show strong in-plane anisotropy in electrical, optical, and mechanical properties and has been used as polarization-sensitive photo-detectors in the short wave region.

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

Germanium disulfide powder

Germanium Disulfide Powder

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

Sold by weight

≥99.995% purity

From £220

Germanium disulfide crystal

Germanium Disulfide by Size

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

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Germanium disulfide powder can also be used to prepare GeS2 nanosheets and nanoparticles by liquid-exfoliation (normally assisted by sonication). 

Key Product Data

Structure of Germanium Disulfide

GeS2 crystallizes in the tetragonal P4_2/nmc space group. The structure is two-dimensional and consists of two GeS2 sheets oriented in the (0, 0, 1) direction. Ge4+ is bonded to four equivalent S2- atoms to form corner-sharing GeS4 tetrahedra. All Ge–S bond lengths are 2.27 Å. S2- is bonded in a water-like geometry to two equivalent Ge4+ atoms.

Tetragonal GeS2 is considered a structure of high symmetry: a GeS2 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.

germanium disulfide crystal structure - GeS2
Top and side view of single-layer germanium disulfide (GeS2)

Properties of Germanium Disulfide

After exfoliation of crystals or powder, germanium disulfide typically has the following properties:

  • Group IV layered metal dichalcogenides
  • Tetragonal (HgI2-type) crystal structure (Space group P4_2/nmc)
  • Strong in-plane anisotropy
  • Great candidate for both memory and energy storage

Germanium Disulfide Applications

Germanium disulfide single crystals can be used to prepare monolayer and few-layer GeS2 by mechanical or liquid exfoliation. Germanium disulfide powder is suitable for liquid chemical exfoliation to prepare GeS2 nanosheets and nanoparticles down to few-layer films. 

Germanium disulfide is of great interest in application of electrode material for batteries in energy storage devices.

Germanium disulfide is of particular interest for energy storage, i.e. cutting-edge solid state battery application with potential value in the production of cathodes for batteries. 2D germanium disulfide in its nanoforms or together with graphene as nanocomposites also has great potential as an anode material for high-performance lithium-sulfur batteries. It has been demonstrated that GeS2/rGO hybrid anode gives a beyond-theoretical-capacity high reversible specific capacity of 805 mA h g−1, an excellent rate capability of 616 mA h g−1 at 5 A g−1, and a cycle retention of 89.4% after 100 cycles. GeS2/rGO hybrid anodes gives the rise of a new approach for developing high-performance energy storage applications.

Thanks to its large infrared optical transmission window, GeS2 finds applications for night vision, acusto-optical modulators, chemical sensors, mid-infrared light delivery, thermal imaging, environmental monitoring, integrated optics.

Like many other 2D metal sulfides, germanium disulfide nanoparticles can serve as a potential photocatalyst for H2 evolution. Ultralow switching voltage and power consumption of GeSthin film enable applications of GeS2 for low energy RRAM device.

Processing Germanium Disulfide

Viscoelastic transfer using PDMS

Literature and Reviews

  • Highly reversible and superior Li-storage characteristics of layered GeS2 and its amorphous composites, G-K. Sung et al., CS Appl. Mater. Interfaces, 8, 43, 29543–29550 (2016); DOI: 10.1021/acsami.6b10994.
  • Sub-Angstrom Characterization of the Structural Origin for High In-Plane Anisotropy in 2D GeS2, X. Wang et al., ACS Nano, 14, 4456−4462 (2020); DOI: 10.1021/acsnano.9b10057.
  • Establishing the structure of GeS2 at high pressures and temperatures: a combined approach using x-ray and neutron diffraction, A. Zeidler et al., J. Phys.: Condens. Matter 21 , 474217 (2009); DOI: 10.1088/0953-8984/21/47/474217.
  • A Robust Approach for Efficient Sodium Storage of GeS2 Hybrid Anode by Electrochemically Driven Amorphization, J-H. Kim et al., Adv. Energy Mater., 8, 1703499 (2018); DOI: 10.1002/aenm.201703499.
  • Preparation of GeS2/graphene nanocomposite with high lithium storage capacity, S. Kang et al., ICSMIM (2015); DOI: 10.2991/icsmim-15.2016.28.
  • Spectroscopic evidence of coexistence of clusters based on low (α) and high temperature (β) GeS2 crystalline phases in glassy germanium disulfide matrix, V. Mitsa et al., MIPRO 2014/MEET, DOI:10.1109/MIPRO.2014.6859522.
  • Composite Sulfur Electrode for All-solid-state Lithium–sulfur Battery with Li2S–GeS2–P2S5-based Thio-LISICON Solid Electrolyte, K. Suzuki et al., Electrochem., 86, 1-5 (2018); DOI: 10.5796/electrochemistry.17-00055.
  • Booming Development of Group IV–VI Semiconductors: Fresh Blood of 2D Family, X. Zhou et al., Booming Development of Group IV–VI Semiconductors: Fresh Blood of 2D Family, X. Zhou et al., Adv. Sci., 3, 1600177 (2016); DOI: 10.1002/advs.201600177.
  • The Verification of Thermoelectric Performance Obtained by High-Throughput Calculations: The Case of GeS2 Monolayer From First-Principles Calculations, X. Wang et al., ront. Mater., 709757 (2021); DOI: 10.3389/fmats.2021.709757.
  • Ultralow switching voltage and power consumption of GeS2 thin film resistive switching memory, N. Lyapunov et al., J. Adv. Dielectr., 11, 2150004 (2021); DOI: 10.1142/S2010135X21500041.

Technical Data

CAS Number ‎‎12025-34-2
Chemical Formula GeS2
Molecular Weight 136.77 g/mol
Bandgap 2.265 eV (monoclinic); 2.599 eV (Tetragonal)
Preparation Synthetic - Chemical Vapour Transport (CVT)
Structure ‎‎‎Tetragonal
Electronic Properties 2D semiconductor
Melting Point 825 °C (lit.)
Colour Black
Synonyms Germanium(IV) sulfide
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%

MSDS Documents

Germanium disulfide powder MSDSGermanium disulfide powder

Germanium disulfide crystal MSDSGermanium disulfide crystal

Pricing Table

Product Code Form Size/Weight* Price
M2305C1 Powder 500 mg £220
M2305C1 Powder 1 g £350
M2305A10 Crystal Small (≥10 mm2) £680 ea.
M2305A25 Crystal Medium (≥25 mm2) £1200 ea.

*typical representative size, areas/dimensions may vary

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To the best of our knowledge the information provided here is accurate. The values provided are typical at the time of manufacture and may vary over time and from batch to batch. Products may have minor cosmetic differences (e.g. to the branding) compared to the photos on our website. All products are for laboratory and research and development use only.

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