Note that all energy levels in the valence band are empty.

热能量和外加电场不能够提高在价带中最上层电子到导带.

互联网

In the band structure, one band that is completely filled with electrons is termed valence band.

在能带结构中, 完全填满电子的带被称为价带.

互联网

The reason is that their valence band is full of electrons, which obstructs current flow.

因为它们的价带填满了电子, 使电流无法流动.

互联网