noun
valence band
Solid-state physics term for the highest energy band that is fully occupied by electrons at absolute zero.
半導体では、価電子帯と伝導帯の間にバンドギャップが存在する。
In semiconductors, a band gap exists between the valence band and the conduction band.
The conduction band is the energy band above the valence band; electrons can move freely in it, enabling electrical conduction.
Compound of 価電子 (valence electron) + 帯 (band). The term is a direct translation of the English 'valence band'.