SiH2
Silylene · Silicon dihydride
Silylene is a highly reactive chemical species consisting of a silicon atom bonded to two hydrogen atoms. Due to its unstable nature, it is primarily utilized as a transient intermediate in chemical vapor deposition processes for the production of silicon-based thin films.
Key Properties
Cross-validated computational properties for Silylene, 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.
Reported Structures
Lowest-energy structures reported for SiH2, 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. |
|---|---|---|---|---|---|
| P21/m (No. 11) | monoclinic | 4.02 | 0.0403 | -5.195 | 0.93 |
| C2/m (No. 12) | Monoclinic | — | — | — | 1.93 |
| Pmc21 (No. 26) | Orthorhombic | — | — | — | 2.09 |
| Pmc21 (No. 26) | Orthorhombic | — | — | — | 2.25 |
| P63/mmc (No. 194) | Hexagonal | — | — | — | 3.17 |
| Cmcm (No. 63) | Orthorhombic | — | — | — | 2.29 |
| Cmcm (No. 63) | Orthorhombic | — | — | — | 1.73 |
| Cmcm (No. 63) | Orthorhombic | — | — | — | 1.64 |
| P-1 (No. 2) | Triclinic | — | — | — | 1.69 |
| P63/mmc (No. 194) | Hexagonal | — | — | — | 2.33 |
| P63/mmc (No. 194) | Hexagonal | — | — | — | 2.19 |
| Cm (No. 8) | Monoclinic | — | — | — | 2.59 |
Applications
Where Silylene is used.
Frequently Asked Questions
Common questions about Silylene, answered from cross-validated data.
What is SiH2?
Silylene is a highly reactive chemical species consisting of a silicon atom bonded to two hydrogen atoms. Due to its unstable nature, it is primarily utilized as a transient intermediate in chemical vapor deposition processes for the production of silicon-based thin films.
What is SiH2 used for?
What is the band gap of SiH2?
Is SiH2 a metal, semiconductor, or insulator?
Is SiH2 thermodynamically stable?
What is the crystal structure of SiH2?
What is the density of SiH2?
How many polymorphs of SiH2 are known?
What elements does SiH2 contain?
Where does the data for SiH2 come from?
Related Compounds
Other Silicon Anode 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.
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