There are conduction and valence bands in semiconductor materials
Release time:
2024-03-27
Source:
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It can also turn the energy of electricity into light, and the width of the forbidden band of the material determines the working wavelength of the optoelectronic device. The development of materials science enables us to use the energy band engineering of semiconductor materials for a variety of exquisite cutting, so that it can meet our various needs and do more things for us, but also to make the semiconductor optoelectronic devices work wavelength breakthrough material band gap width limit extended to a wider range.
The operating wavelength of a semiconductor optoelectronic device is dependent on the type of semiconductor material used to fabricate the device. There is a conduction band and a valence band in semiconductor materials, and electrons can move freely on the conduction band,
Under the valence band, holes can move freely. There is a forbidden band between the conduction band and the valence band. When electrons absorb the energy of light and jump from the valence band to the conduction band, the energy of light becomes electricity.
The electrons with electrical energy jump back from the conduction band to the valence band, and the energy of the electricity can be turned into light. At this time, the width of the material band gap determines the operating wavelength of the optoelectronic device.
The development of materials science enables us to use energy band engineering to make various exquisite tailoring of the energy band of semiconductor materials, so that it can meet our various needs and do more for us,
It can also make the operating wavelength of semiconductor optoelectronic devices break through the limit of the forbidden band width of the material and extend it to a wider range.
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