Ge2K2Se8Sm2
Ge2K2Se8Sm2 is a stable, semiconducting quaternary chalcogenide compound investigated for its potential utility in advanced optoelectronic and energy-related applications.
About Ge2K2Se8Sm2
Ge2K2Se8Sm2 is a complex quaternary chalcogenide that functions as a semiconductor. Its position on the convex hull indicates high thermodynamic stability, making it a robust candidate for structural investigations within solid-state chemistry. The material's unique arrangement of germanium, potassium, selenium, and samarium atoms allows for tunable electronic properties that are essential for developing next-generation energy harvesting devices.
Beyond its fundamental stability, this compound is of significant interest for researchers exploring non-traditional photovoltaic materials. By leveraging the specific electronic character of its constituent elements, it offers a distinct alternative to conventional halide-based systems, potentially providing different pathways for charge carrier transport and light absorption in specialized optoelectronic applications.
Key Properties
Cross-validated computational properties for Ge2K2Se8Sm2, aggregated across 3 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.
Reported Structures
Lowest-energy structures reported for Ge2K2Se8Sm2, 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. |
|---|---|---|---|---|---|
| P21 (No. 4) | monoclinic | 1.66 | 0.0000 | -4.896 | 4.48 |
| — | — | — | — | — | 4.21 |
| — | — | — | — | — | 4.50 |
| — | — | — | — | — | 4.17 |
| No. 0 | unknown | — | — | — | 2.38 |
Applications
Where Ge2K2Se8Sm2 is used.
Frequently Asked Questions
Common questions about Ge2K2Se8Sm2, answered from cross-validated data.
What is Ge2K2Se8Sm2?
Ge2K2Se8Sm2 is a stable, semiconducting quaternary chalcogenide compound investigated for its potential utility in advanced optoelectronic and energy-related applications.
What is Ge2K2Se8Sm2 used for?
What is the band gap of Ge2K2Se8Sm2?
Is Ge2K2Se8Sm2 a metal, semiconductor, or insulator?
Is Ge2K2Se8Sm2 thermodynamically stable?
What is the crystal structure of Ge2K2Se8Sm2?
What is the density of Ge2K2Se8Sm2?
How many polymorphs of Ge2K2Se8Sm2 are known?
What elements does Ge2K2Se8Sm2 contain?
Where does the data for Ge2K2Se8Sm2 come from?
How It Compares
Within the halide perovskite photovoltaics class.
Unlike the widely studied halide perovskites such as CsPbBr3 or CsSnI3, which typically feature lead or tin centers, Ge2K2Se8Sm2 incorporates rare-earth samarium and germanium into its lattice. While its siblings in the halide perovskite class often focus on high-efficiency light conversion, this compound represents a more exotic structural class that prioritizes chemical stability and complex coordination environments over the standard halide-based architectures found in materials like RbPbF3 or Cs4I12Sn4.
Related Compounds
Other Halide Perovskite Photovoltaics in the database.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- omat24 — Data from OMat24 (Meta FAIR). Cite: Barroso-Luque et al., arXiv 2410.12771 (2024).
- cod — Data from the Crystallography Open Database. Cite: Grazulis et al., Nucleic Acids Res. 40, D420 (2012).
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