| 词汇 | valence-band |
| 释义 | BETA valence bandcollocation in Englishmeanings of bandThese words are often used together. Click on the links below to explore the meanings. band noun uk /bænd/ us /bænd/ a group of musicians who play modern ... See more at band Examples of valence bandvalence band Electrons in the valenceband occupy a range of lower energy states, and are relatively immobile. A silicon atom has four electrons in the valenceband; phosphorus has five such electrons, and boron three. Additionally, the effective mass of holes in the valenceband is changed to more closely match that of electrons in the conduction band. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Including and, this kind of semiconducting titanates, the conduction band has mainly titanium 3d character and the valenceband oxygen 2p character. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The band diagram typically indicates the variation in the valenceband and conduction band edges versus some spatial dimension, often denoted "x". From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. In other words, donor impurities create states near the conduction band while acceptors create states near the valenceband. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Then, the density of free carriers in the conduction and/or the valenceband will increase. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Note that interband transition is the transition between the conduction and valenceband. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Many copper chalcogenides are degenerate p-type semiconductors with relatively large numbers of holes in their valenceband. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. In many metals, however, the bands are neither electron-like nor hole-like, and often just called valenceband as they are made of valence orbitals. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. This is also applicable for electrons in the valenceband (often understood in terms of holes). From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The removed electrons are drawn from the valenceband levels, leaving vacancies or "holes" in the valenceband. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. In an intrinsic semiconductor the number of electrons in the conduction band is equal to the number of holes in the valenceband. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The ionizing radiation produces electron-hole pairs - electrons are in the conduction band and holes in the valenceband. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. For example, in a semiconductor the minimum photon energy would actually correspond to the valenceband edge rather than work function. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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