Tungsten trioxide (WO3) is a typical transition metal oxide with a specific energy band structure. The following are the main features of the energy band structure of tungsten trioxide:
Energy band type: Tungsten trioxide is an indirect band gap material. This means that the lowest point of its conduction band and the highest point of its valence band do not occur at the same momentum (k) point.
Tungsten Trioxide Energy Band Structure Bandgap Width
The bandgap width of tungsten trioxide is about 2.6 eV to 2.9 eV, depending on the crystal structure and doping of the material. This energy bandgap determines its ability to absorb light in the visible spectral range.
Band Structure Conduction And Valence Bands
The conduction band of tungsten trioxide is mainly formed by the 4d orbital of tungsten, while the valence band is formed by the 2p orbital of oxygen. The energy gap between the conduction band and the valence band makes tungsten trioxide have high electron mobility and good electrical conductivity.
Band Structure Oxide State
In oxidized tungsten trioxide, each tungsten atom forms an octahedral structure with six oxygen atoms in a six-coordinated manner. This octahedral structure plays a key role in the energy band structure and affects the optical, electrical and catalytic properties of the material.
Band Structure Doping Control
By properly doping tungsten trioxide, such as doping with calcium ions (Ca2+) or manganese ions (Mn3+), its energy band structure and properties can be adjusted. This doping can change the positions of the conduction and valence bands and tune the optical and electrical properties.
The energy band structure of tungsten trioxide is affected by factors such as the crystal structure of the material, doping and preparation conditions. Therefore, in research and application, proper characterization and analysis of specific materials is required to understand their energy band structure and its relationship with material properties.
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