Hello, I am not sure if I am posting in the right place, but here are my thoughts. I don't exactly understand how solar cell works, but it has to do with photons knocking out electron which makes the current flow. So I thought about the WiFi based charger. It generates electricity from WiFi waves, right? Which are electromagnetic, like visible light. In that case, could we use same principle to generate electricity from visible light waves? Any thought appreciated.