Just like with the ionization energy there's a discrete energy jump involved with the adding of an electron.

就像电离能一样， 有一个离散的能量跃迁涉及到一个电子的添加。

As they absorb light, electrons receive enough energy to jump across the junction between the layers, producing an electric current.

当电子吸收光时， 它们会获得足够的能量来跨越层之间的连接点，产生电流。