Y2Se3
Y2Se3 is a stable, semiconducting yttrium selenide compound characterized by a diverse range of known structural configurations.
About Y2Se3
Y2Se3 is a thermodynamically stable compound composed of yttrium and selenium. As a semiconductor, it occupies a significant position in the study of rare-earth chalcogenides, benefiting from a robust structural framework that sits on the convex hull of stability.
With numerous reported structures, this material is a subject of interest for researchers investigating the electronic and optical properties of metal-selenide systems. Its stable nature makes it a reliable candidate for exploring complex phase behavior in solid-state chemistry.
Key Properties
Cross-validated computational properties for Y2Se3, 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.
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.
Cross-Source DFT Agreement
How well independent DFT databases agree on the thermodynamics of Y2Se3. Tight agreement means computed properties can be trusted without re-running calculations.
Agreement ScoreA normalized confidence score summarizing how closely independent DFT databases agree. Higher scores mean tighter cross-source agreement.
Hull SpreadDifference between the highest and lowest energy-above-hull values reported by comparable sources. Smaller spread means less thermodynamic disagreement.
Sources ComparedNumber and names of computational sources with comparable entries for this formula.
Space Group ConsensusWhether independent sources predict the same crystal symmetry for the lowest-energy structure.
Reported Structures
Lowest-energy structures reported for Y2Se3, 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. |
|---|---|---|---|---|---|
| — | — | 1.43 | 0.0000 | -1.905 | — |
| Fddd (No. 70) | orthorhombic | 1.32 | 0.0000 | -18.912 | 4.74 |
| — | — | 2.02 | 0.0218 | -1.883 | — |
| — | — | 1.25 | 0.0274 | -1.877 | — |
| — | — | 0.54 | 0.0294 | -1.875 | — |
| — | — | 2.14 | 0.0381 | -1.866 | — |
| I-42d (No. 122) | tetragonal | 1.55 | 0.0597 | -18.852 | 5.54 |
| — | — | 0.53 | 0.0642 | -1.840 | — |
| Cm (No. 8) | monoclinic | — | — | — | 4.75 |
| C2 (No. 5) | monoclinic | — | — | — | 4.43 |
| P-1 (No. 2) | triclinic | — | — | — | 4.88 |
| C2 (No. 5) | monoclinic | — | — | — | 6.58 |
Applications
Where Y2Se3 is used.
Frequently Asked Questions
Common questions about Y2Se3, answered from cross-validated data.
What is Y2Se3?
Y2Se3 is a stable, semiconducting yttrium selenide compound characterized by a diverse range of known structural configurations.
What is Y2Se3 used for?
What is the band gap of Y2Se3?
Is Y2Se3 a metal, semiconductor, or insulator?
Is Y2Se3 thermodynamically stable?
What is the crystal structure of Y2Se3?
What is the density of Y2Se3?
How many polymorphs of Y2Se3 are known?
What elements does Y2Se3 contain?
Where does the data for Y2Se3 come from?
How It Compares
As a stable binary chalcogenide, Y2Se3 serves as a foundational example of yttrium-based semiconductors, providing a baseline for understanding the structural diversity and electronic behavior inherent in rare-earth selenide systems.
Data sources & attribution
- oqmd — Data from the OQMD (oqmd.org). Cite: Saal et al., JOM 65, 1501 (2013); Kirklin et al., npj Comp. Mater. 1, 15010 (2015). (CC-BY-4.0)
- materials_project — Data from the Materials Project (materialsproject.org). Cite: Jain et al., APL Materials 1, 011002 (2013). (CC-BY-4.0)
- mpaloe — Data from MP-ALOE. Cite: Kuner et al., npj Comput. Mater. (2025), doi:10.1038/s41524-025-01834-9.
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