CsTe
Cesium telluride is a binary inorganic compound composed of cesium and tellurium. It is primarily utilized in specialized scientific research and advanced optoelectronic devices due to its specific photoemissive properties.
CsTe
Overview
Key Properties
Cross-validated computational properties for CsTe, aggregated across 2 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.
1.00 eV
Range across DFT structures
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.
0.000 eV/atom
Best (lowest) across sources
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.
On hull (stable)
1 DFT source
StructuresCount of reported calculated crystal structures for this formula, including alternate polymorphs, source databases, and observed space groups.
85
2 databases, 14 space groups
Crystallography
Reported Structures
Lowest-energy structures reported for CsTe, 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. |
|---|---|---|---|---|---|
| Pbam (No. 55) | orthorhombic | 1.00 | 0.0000 | -26.327 | 4.70 |
| P21/c (No. 14) | Monoclinic | — | — | — | 3.12 |
| Fmmm (No. 69) | Orthorhombic | — | — | — | 3.39 |
| Pbam (No. 55) | Orthorhombic | — | — | — | 4.53 |
| Pbam (No. 55) | Orthorhombic | — | — | — | 4.61 |
| Pbam (No. 55) | Orthorhombic | — | — | — | 4.61 |
| P-1 (No. 2) | Triclinic | — | — | — | 3.40 |
| P-1 (No. 2) | Triclinic | — | — | — | 3.81 |
| P-1 (No. 2) | Triclinic | — | — | — | 4.04 |
| P-1 (No. 2) | Triclinic | — | — | — | 2.55 |
| P-1 (No. 2) | Triclinic | — | — | — | 2.75 |
| Fmmm (No. 69) | Orthorhombic | — | — | — | 3.63 |
Uses
Applications
Where CsTe is used.
PhotocathodesPhotoelectron sourcesParticle accelerators
Reference
Frequently Asked Questions
Common questions about CsTe, answered from cross-validated data.
What is CsTe?
Cesium telluride is a binary inorganic compound composed of cesium and tellurium. It is primarily utilized in specialized scientific research and advanced optoelectronic devices due to its specific photoemissive properties.
More questions
What is CsTe used for?
CsTe is used in photocathodes, photoelectron sources, and particle accelerators.
What is the band gap of CsTe?
CsTe has a DFT-computed band gap of 1.00 eV across 85 reported structures.
Is CsTe a metal, semiconductor, or insulator?
With a band gap up to 1.00 eV it is a semiconductor.
Is CsTe thermodynamically stable?
Yes — CsTe sits on the convex hull (energy above hull 0 eV/atom), i.e. on hull (stable).
What is the crystal structure of CsTe?
The lowest-energy reported polymorph of CsTe is orthorhombic symmetry, space group Pbam (No. 55).
What is the density of CsTe?
The computed density of the ground-state structure of CsTe is 4.70 g/cm³.
How many polymorphs of CsTe are known?
85 structures of CsTe are reported across 2 databases, spanning 14 distinct space groups.
What elements does CsTe contain?
CsTe contains Cs and Te (2 elements).
Where does the data for CsTe come from?
CsTe data is cross-referenced from materials_project, mpaloe.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- mpaloe — Data from mpaloe.
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