WO2
Tungsten dioxide · Tungsten(IV) oxide
Tungsten dioxide is a thermodynamically stable, semiconducting transition metal oxide frequently studied for its role in electrochromic technology and refractory material applications.
About Tungsten dioxide
Tungsten dioxide is a robust refractory-metal oxide characterized by its semiconducting electronic nature. As a thermodynamically stable phase residing on the convex hull, it serves as a critical material for researchers investigating the complex redox behaviors of transition metal oxides. Its structural versatility is highlighted by the extensive number of reported crystallographic arrangements found in materials databases. This compound is primarily utilized in the development of electrochromic devices and as a precursor for specialized tungsten-based thin films. Its ability to maintain structural integrity under various conditions makes it a foundational component in the study of metal-insulator transitions and catalytic processes.
Key Properties
Cross-validated computational properties for Tungsten dioxide, 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.
Applications
Where Tungsten dioxide is used.
Frequently Asked Questions
Common questions about Tungsten dioxide, answered from cross-validated data.
What is WO2?
Tungsten dioxide is a thermodynamically stable, semiconducting transition metal oxide frequently studied for its role in electrochromic technology and refractory material applications.
What is WO2 used for?
What is the band gap of WO2?
Is WO2 a metal, semiconductor, or insulator?
Is WO2 thermodynamically stable?
How many polymorphs of WO2 are known?
What elements does WO2 contain?
Where does the data for WO2 come from?
How It Compares
Within the electrochromic and refractory-metal oxides class.
Within the family of refractory-metal oxides, tungsten dioxide occupies a distinct niche compared to its more oxidized counterpart, tungsten trioxide. While tungsten trioxide is widely recognized for its prominent electrochromic properties, tungsten dioxide offers a different electronic profile that complements the behavior of molybdenum-based oxides like molybdenum dioxide and molybdenum trioxide. It shares the structural complexity inherent to the transition metal oxide class, standing alongside niobium oxides such as niobium dioxide and niobium pentoxide as a key subject for understanding valence state stability.
Related Compounds
Other Electrochromic and Refractory-Metal Oxides in the database.
Data sources & attribution
- latticegraph — Lattice Graph Materials Intelligence Platform
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