GeS
germanium monosulfide · germanium(II) sulfide
Germanium monosulfide is a stable, semiconducting inorganic compound used in research for electronic and optoelectronic applications.
About germanium monosulfide
Germanium monosulfide is a binary chalcogenide that stands out for its robust thermodynamic stability. As a semiconducting material, it has garnered significant attention from researchers looking for alternatives to traditional silicon-based electronics.
Its structural versatility is evidenced by a vast array of reported configurations across major materials databases. This adaptability makes it a compelling candidate for fundamental studies in solid-state physics and the development of next-generation semiconductor technologies.
Key Properties
Cross-validated computational properties for germanium monosulfide, aggregated across 5 databases.
Band GapEnergy needed to move an electron from the valence band to the conduction band. Lower or zero values tend to behave more metallic; larger gaps are more insulating or semiconducting.
Energy Above HullThermodynamic distance from the most stable set of competing phases. 0 eV/atom is on the convex hull; small positive values may still be experimentally accessible.
StabilityA plain-language summary of the best reported energy-above-hull result. It reflects whether the lowest-energy structure is on, near, or far from the stability hull.
StructuresCount of reported calculated crystal structures for this formula, including alternate polymorphs, source databases, and observed space groups.
Cross-Source DFT Agreement
How well independent DFT databases agree on the thermodynamics of GeS. Tight agreement means computed properties can be trusted without re-running calculations.
Agreement ScoreA normalized confidence score summarizing how closely independent DFT databases agree. Higher scores mean tighter cross-source agreement.
Hull SpreadDifference between the highest and lowest energy-above-hull values reported by comparable sources. Smaller spread means less thermodynamic disagreement.
Sources ComparedNumber and names of computational sources with comparable entries for this formula.
Space Group ConsensusWhether independent sources predict the same crystal symmetry for the lowest-energy structure.
Reported Structures
Lowest-energy structures reported for GeS, ranked by energy above hull.
| Space GroupSymmetry classification of the crystal arrangement. The number is the international space-group index. | Crystal SystemBroad lattice family, such as cubic, tetragonal, monoclinic, or triclinic, derived from unit-cell symmetry. | Band Gap (eV)Electronic gap calculated for this specific reported structure, measured in electronvolts. | E above hull (eV/atom)Thermodynamic distance from the convex hull for this structure, normalized per atom. Lower is generally more stable. | E/atom (eV)Computed total energy normalized per atom. Use energy above hull, not this value alone, when comparing stability. | Density (g/cm³)Mass per relaxed crystal volume, reported in grams per cubic centimeter. |
|---|---|---|---|---|---|
| — | — | 1.35 | 0.0000 | -0.397 | — |
| Pnma (No. 62) | orthorhombic | 1.32 | 0.0000 | -0.360 | — |
| Pnma (No. 62) | orthorhombic | 1.24 | 0.0000 | -4.881 | 3.96 |
| — | — | 1.45 | 0.0097 | -0.387 | — |
| — | — | 0.59 | 0.0382 | -0.359 | — |
| — | — | 0.57 | 0.0447 | -0.352 | — |
| Cmcm (No. 63) | orthorhombic | 0.82 | 0.0457 | -0.314 | — |
| — | — | 0.39 | 0.0538 | -0.343 | — |
| — | — | 0.39 | 0.0540 | -0.343 | — |
| Cmcm (No. 63) | orthorhombic | 0.55 | 0.0762 | -4.805 | 4.21 |
| — | — | 1.12 | 0.1546 | -0.242 | — |
| — | — | 0.00 | 0.2373 | -0.160 | — |
Synthesis Routes
Literature-extracted synthesis procedures targeting GeS.
Applications
Where germanium monosulfide is used.
Patent Landscape
1 patent reference GeS or close compositional variants.
| Patent | Title | Assignee | Granted |
|---|---|---|---|
| 11916234 | Anhydrous liquid-phase exfoliation of pristine electrochemically-active GeS nanosheets | — | — |
Frequently Asked Questions
Common questions about germanium monosulfide, answered from cross-validated data.
What is GeS?
Germanium monosulfide is a stable, semiconducting inorganic compound used in research for electronic and optoelectronic applications.
What is GeS used for?
What is the band gap of GeS?
Is GeS a metal, semiconductor, or insulator?
Is GeS thermodynamically stable?
What is the crystal structure of GeS?
How many polymorphs of GeS are known?
How is GeS synthesized?
What elements does GeS contain?
Where does the data for GeS come from?
How It Compares
As a standalone binary compound, germanium monosulfide serves as a primary reference point for studying group 14-chalcogenide interactions. Its position on the convex hull highlights its inherent stability, distinguishing it as a reliable subject for experimental synthesis and computational modeling compared to less stable or metastable phases within the broader family of germanium-based chalcogenides.
Data sources & attribution
- oqmd — Data from the OQMD (oqmd.org). Cite: Saal et al., JOM 65, 1501 (2013); Kirklin et al., npj Comp. Mater. 1, 15010 (2015). (CC-BY-4.0)
- jarvis — Data from JARVIS (jarvis.nist.gov), NIST. Cite: Choudhary et al., npj Comp. Mater. 6, 173 (2020). (LicenseRef-US-Gov-PD)
- materials_project — Data from the Materials Project (materialsproject.org). Cite: Jain et al., APL Materials 1, 011002 (2013). (CC-BY-4.0)
- mpaloe — Data from MP-ALOE. Cite: Kuner et al., npj Comput. Mater. (2025), doi:10.1038/s41524-025-01834-9.
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