CaCdO2
CaCdO2 is a stable, semiconducting oxide material investigated for its potential role in transparent electronics and optoelectronic applications.
About CaCdO2
CaCdO2 is a semiconducting oxide that maintains a position on the thermodynamic convex hull, indicating robust structural stability. As a member of the transparent conducting oxide family, it is studied for its potential to balance electrical conductivity with optical transparency, a critical requirement for next-generation electronic devices. Its electronic character allows for precise tuning, making it a subject of interest in materials science research. The compound has been characterized across multiple databases, reflecting significant interest in its structural properties and potential utility in thin-film technologies. By leveraging its stable crystalline framework, researchers aim to optimize its performance for integration into optoelectronic systems where transparency and charge transport are essential.
Key Properties
Cross-validated computational properties for CaCdO2, aggregated across 4 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 CaCdO2. 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 CaCdO2, 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. |
|---|---|---|---|---|---|
| — | — | 0.64 | 0.0000 | -2.236 | — |
| P4/mmm (No. 123) | tetragonal | 0.38 | 0.0000 | -5.560 | 5.69 |
| — | — | 0.63 | 0.0001 | -2.236 | — |
| — | — | 0.63 | 0.0001 | -2.236 | — |
| — | — | 1.80 | 0.0018 | -2.234 | — |
| — | — | 1.80 | 0.0018 | -2.234 | — |
| P4/mmm (No. 123) | tetragonal | 0.54 | 0.0039 | -2.242 | — |
| — | — | 0.64 | 0.0041 | -2.232 | — |
| — | — | 0.77 | 0.0041 | -2.232 | — |
| — | — | 0.74 | 0.0070 | -2.229 | — |
| — | — | 1.78 | 0.1640 | -2.072 | — |
| — | — | 1.05 | 0.2919 | -1.944 | — |
Applications
Where CaCdO2 is used.
Frequently Asked Questions
Common questions about CaCdO2, answered from cross-validated data.
What is CaCdO2?
CaCdO2 is a stable, semiconducting oxide material investigated for its potential role in transparent electronics and optoelectronic applications.
What is CaCdO2 used for?
What is the band gap of CaCdO2?
Is CaCdO2 a metal, semiconductor, or insulator?
Is CaCdO2 thermodynamically stable?
What is the crystal structure of CaCdO2?
What is the density of CaCdO2?
How many polymorphs of CaCdO2 are known?
What elements does CaCdO2 contain?
Where does the data for CaCdO2 come from?
How It Compares
Within the transparent conducting oxides class.
Within the broader class of transparent conducting oxides, CaCdO2 occupies a distinct niche compared to well-known materials like ZnO or BaSnO3. While ZnO is widely utilized for its established optoelectronic properties, CaCdO2 offers a different structural configuration that provides researchers with alternative pathways for band engineering and carrier mobility optimization, setting it apart from more common spinel-structured oxides like ZnGa2O4 or ZnCr2O4.
Related Compounds
Other Transparent Conducting Oxides in the database.
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)
- jarvis — Data from JARVIS (jarvis.nist.gov), NIST. Cite: Choudhary et al., npj Comp. Mater. 6, 173 (2020). (LicenseRef-US-Gov-PD)
- mpaloe — Data from MP-ALOE. Cite: Kuner et al., npj Comput. Mater. (2025), doi:10.1038/s41524-025-01834-9.
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