CsK2Sb
Cesium potassium antimonide · CsK2Sb
Cesium potassium antimonide is a multialkali semiconductor material primarily utilized for its efficient light-to-electricity conversion properties. It is widely recognized as a high-performance photocathode material in vacuum electronic devices.
Key Properties
Cross-validated computational properties for Cesium potassium antimonide, 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 CsK2Sb, 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. |
|---|---|---|---|---|---|
| Fm-3m (No. 225) | cubic | 0.86 | 0.0000 | -16.269 | 3.45 |
| Fm-3m (No. 225) | — | — | — | — | — |
| — | — | — | — | — | 3.32 |
Applications
Where Cesium potassium antimonide is used.
Frequently Asked Questions
Common questions about Cesium potassium antimonide, answered from cross-validated data.
What is CsK2Sb?
Cesium potassium antimonide is a multialkali semiconductor material primarily utilized for its efficient light-to-electricity conversion properties. It is widely recognized as a high-performance photocathode material in vacuum electronic devices.
What is CsK2Sb used for?
What is the band gap of CsK2Sb?
Is CsK2Sb a metal, semiconductor, or insulator?
Is CsK2Sb thermodynamically stable?
What is the crystal structure of CsK2Sb?
What is the density of CsK2Sb?
How many polymorphs of CsK2Sb are known?
What elements does CsK2Sb contain?
Where does the data for CsK2Sb come from?
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- jarvis — Data from JARVIS (NIST). Cite: Choudhary et al., npj Comp. Mater. 6, 173 (2020).
- omat24 — Data from OMat24 (Meta FAIR). Cite: Barroso-Luque et al., arXiv 2410.12771 (2024).
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