Cs4Ge2Se8
Cs4Ge2Se8 is a thermodynamically stable, semiconducting chalcogenide compound used in the study of advanced electronic and optoelectronic materials.
About Cs4Ge2Se8
Cs4Ge2Se8 is a semiconducting compound that occupies a stable position on the thermodynamic convex hull. As a member of the broader family of perovskite-related materials, it represents a complex structural arrangement of cesium, germanium, and selenium that facilitates specific electronic properties suitable for semiconducting applications. Its structural integrity makes it a noteworthy subject for researchers investigating alternative materials for optoelectronic devices. The compound is primarily studied for its potential to serve as a functional component in advanced semiconductor technologies, where its unique composition offers a distinct alternative to traditional halide-based systems. By leveraging its inherent stability, developers can explore new pathways for integrating complex chalcogenides into high-performance electronic architectures.
Key Properties
Cross-validated computational properties for Cs4Ge2Se8, 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 Cs4Ge2Se8, 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. |
|---|---|---|---|---|---|
| C2/m (No. 12) | monoclinic | 1.68 | 0.0000 | -3.966 | 4.16 |
| C2/m (No. 12) | — | — | — | — | — |
| — | — | — | — | — | 3.08 |
Applications
Where Cs4Ge2Se8 is used.
Frequently Asked Questions
Common questions about Cs4Ge2Se8, answered from cross-validated data.
What is Cs4Ge2Se8?
Cs4Ge2Se8 is a thermodynamically stable, semiconducting chalcogenide compound used in the study of advanced electronic and optoelectronic materials.
What is Cs4Ge2Se8 used for?
What is the band gap of Cs4Ge2Se8?
Is Cs4Ge2Se8 a metal, semiconductor, or insulator?
Is Cs4Ge2Se8 thermodynamically stable?
What is the crystal structure of Cs4Ge2Se8?
What is the density of Cs4Ge2Se8?
How many polymorphs of Cs4Ge2Se8 are known?
What elements does Cs4Ge2Se8 contain?
Where does the data for Cs4Ge2Se8 come from?
How It Compares
Within the halide perovskite photovoltaics class.
Unlike the widely studied halide perovskite CsPbBr3, which is renowned for its optoelectronic efficiency, Cs4Ge2Se8 features a more complex anionic framework that differentiates it from simpler halide structures like CsSnI3. While many of its class members rely on simple halide coordination, this compound utilizes a selenium-based network to achieve its semiconducting character, placing it in a specialized niche of stable, non-traditional perovskite-related materials.
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).
- aflow — Data from AFLOW. Cite: Curtarolo et al., Comp. Mater. Sci. 58, 218 (2012).
- omat24 — Data from OMat24 (Meta FAIR). Cite: Barroso-Luque et al., arXiv 2410.12771 (2024).
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