Tungsten oxide (WO3) is visible light responsive, which means it absorbs photons in the visible range and responds accordingly. Traditionally, tungsten oxide is considered as a wide-bandgap semiconductor material, with a bandgap energy of about 2.5-3.0 electron volts (eV), and weak absorption of visible light. However, several studies have shown that the absorption and response of tungsten oxide in the visible range is possible. This improvement in visible light responsivity is mainly achieved by:
Tungsten Oxide (WO3) Has Visible Light Responsive Crystal Structure Regulation
Changing the crystal structure or morphology of tungsten oxide, such as nanostructure and polycrystalline morphology, can adjust its energy band structure and enhance visible light absorption and response performance.
Tungsten oxide (WO3) has visible light responsive tungsten oxide doping
By introducing doping elements, such as manganese (Mn), aluminum (Al), calcium (Ca), etc., the energy band structure of tungsten oxide can be adjusted, its light absorption range can be broadened, and it has better responsiveness to visible light.
Tungsten Oxide (WO3) with Visible Light Responsive Tungsten Oxide Surface Modification
Through surface modification technology, such as loading other photosensitizers, photosensitive molecules or conductive polymers, etc., the absorption and response ability of the tungsten oxide surface to visible light can be enhanced.
These improvements can enable tungsten oxide to extend its photoresponse range to the visible light region, thereby enhancing its application potential in photocatalysis, optoelectronics, and photoelectric energy conversion. However, the specific visible light response performance still depends on factors such as the preparation method, morphology and doping method of tungsten oxide. It should be pointed out that although tungsten oxide has visible light responsiveness, there are still differences in its absorption degree and photocatalytic efficiency for different wavelength ranges of visible light. Therefore, in specific applications, it is necessary to select appropriate lighting conditions and light sources to optimize the visible light response performance of tungsten oxide.
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