"Activated under illumination—or rather, the equilibrium of that junction is disrupted, resulting in a potential difference?"
"But in this case, the actual environment that gets activated might become invisible to the naked eye..."
Watching Old Faraday eloquently explain, Xu Yun remained silent.
But his tightly clenched hands made it clear his heart was anything but calm.
Everyone knows.
The essence of the photovoltaic phenomenon boils down to atomic band structure, involving the concepts of valence band and conduction band.
The so-called valence band refers to the area closer to the atomic nucleus.
The electrons here are tightly bound and can't escape easily.
The conduction band is farther from the nucleus; electrons here aren't supervised, much freer.
If an external electric field gets these electrons moving, the material conducts electricity.
Apart from these two regions, there's another area above the valence band and below the conduction band.
