Ag1Ga1Se2
silver gallium selenide · AGS
Silver gallium selenide is a stable semiconducting crystal widely utilized for its nonlinear optical properties in infrared laser systems.
About silver gallium selenide
Silver gallium selenide is a thermodynamically stable ternary semiconductor that serves as a significant material in the field of nonlinear optics. Its crystal structure allows for efficient frequency conversion, making it a valuable candidate for advanced optoelectronic devices that operate in the infrared spectrum. The material is characterized by its robust stability, which ensures consistent performance in demanding applications. As a well-documented compound with numerous reported structures, it remains a focal point for researchers investigating high-performance semiconductor crystals for laser technology.
Key Properties
Cross-validated computational properties for silver gallium selenide, 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 Ag1Ga1Se2, 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. |
|---|---|---|---|---|---|
| I-42d (No. 122) | tetragonal | 0.25 | 0.0000 | -15.895 | 5.61 |
| P-4m2 (No. 115) | tetragonal | 0.00 | 0.0335 | -15.862 | 5.39 |
| Pmmm (No. 47) | — | — | — | — | — |
| Pm (No. 6) | — | — | — | — | — |
| P4mm (No. 99) | — | — | — | — | — |
| I-4m2 (No. 119) | — | — | — | — | — |
| Pmmm (No. 47) | — | — | — | — | — |
| Immm (No. 71) | — | — | — | — | — |
| Fm-3m (No. 225) | — | — | — | — | — |
| R-3m (No. 166) | — | — | — | — | — |
| P4mm (No. 99) | — | — | — | — | — |
| C2/m (No. 12) | — | — | — | — | — |
Applications
Where silver gallium selenide is used.
Frequently Asked Questions
Common questions about silver gallium selenide, answered from cross-validated data.
What is Ag1Ga1Se2?
Silver gallium selenide is a stable semiconducting crystal widely utilized for its nonlinear optical properties in infrared laser systems.
What is Ag1Ga1Se2 used for?
What is the band gap of Ag1Ga1Se2?
Is Ag1Ga1Se2 a metal, semiconductor, or insulator?
Is Ag1Ga1Se2 thermodynamically stable?
What is the crystal structure of Ag1Ga1Se2?
What is the density of Ag1Ga1Se2?
How many polymorphs of Ag1Ga1Se2 are known?
What elements does Ag1Ga1Se2 contain?
Where does the data for Ag1Ga1Se2 come from?
How It Compares
As a prominent member of the chalcopyrite-related semiconductor family, this compound is highly regarded for its wide transparency range and effective nonlinear optical coefficients, positioning it as a versatile material for infrared laser applications.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- aflow — Data from AFLOW. Cite: Curtarolo et al., Comp. Mater. Sci. 58, 218 (2012).
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