Sb2Te2Se
Sb2Te2Se is a stable semiconducting chalcogenide compound used in the development of phase-change memory technologies.
About Sb2Te2Se
Sb2Te2Se is a semiconducting chalcogenide compound recognized for its role within the phase-change memory material family. As a thermodynamically stable phase located on the convex hull, it exhibits the structural robustness required for reliable switching applications in advanced electronic devices.
This material is highly regarded for its ability to transition between structural states, a property essential for high-density non-volatile memory. Its presence in multiple structural databases highlights its significance as a subject of ongoing research into efficient data storage and rapid signal processing technologies.
Key Properties
Cross-validated computational properties for Sb2Te2Se, 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 Sb2Te2Se, 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. |
|---|---|---|---|---|---|
| R-3m (No. 166) | trigonal | 0.13 | 0.0000 | -4.062 | 6.01 |
| R3m (No. 160) | trigonal | 0.48 | 0.0321 | -4.030 | 5.95 |
| R-3m (No. 166) | Trigonal | — | — | — | 5.92 |
| R-3m (No. 166) | Trigonal | — | — | — | 6.06 |
| R-3m (No. 166) | — | — | — | — | — |
| R3m (No. 160) | Trigonal | — | — | — | 5.95 |
| R-3m (No. 166) | Trigonal | — | — | — | 6.01 |
| R3m (No. 160) | — | — | — | — | — |
| R3m (No. 160) | Trigonal | — | — | — | 6.17 |
| R3m (No. 160) | Trigonal | — | — | — | 6.08 |
Applications
Where Sb2Te2Se is used.
Frequently Asked Questions
Common questions about Sb2Te2Se, answered from cross-validated data.
What is Sb2Te2Se?
Sb2Te2Se is a stable semiconducting chalcogenide compound used in the development of phase-change memory technologies.
What is Sb2Te2Se used for?
What is the band gap of Sb2Te2Se?
Is Sb2Te2Se a metal, semiconductor, or insulator?
Is Sb2Te2Se thermodynamically stable?
What is the crystal structure of Sb2Te2Se?
What is the density of Sb2Te2Se?
How many polymorphs of Sb2Te2Se are known?
What elements does Sb2Te2Se contain?
Where does the data for Sb2Te2Se come from?
How It Compares
Within the phase-change memory materials class.
Within the diverse landscape of phase-change materials, Sb2Te2Se offers a distinct compositional profile compared to widely studied systems like Ge2Sb2Te5 or Sb2Te3. While many members of this class rely on germanium or silver to tune their switching kinetics, Sb2Te2Se leverages the specific interplay between tellurium and selenium to achieve its stable semiconducting character, providing a unique alternative for device optimization.
Related Compounds
Other Phase-Change Memory Materials in the database.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- mpaloe — Data from mpaloe.
- jarvis — Data from JARVIS (NIST). Cite: Choudhary et al., npj Comp. Mater. 6, 173 (2020).
Analyze Sb2Te2Se in the Lattice Graph platform
Polymorph comparison, confidence scoring, supply-chain risk, and patent monitoring — across 53 integrated data sources.
Explore the Platform →