can we make more Efficient solar panels ? Elon Musk

[0:00]Is that someday, is the solar technology going to get to a point where that's ever going to get more efficient? No! The solar incidence, which somewhat coincidentally, roughly 1000 watts per square meter. Basically, what happens with a photon, it hits the electron, the electron gets excited, jumps over a gap in the semiconductor and races around to the other side, thus creates an electric circuit. You say, okay, well, how are you going to get those electrons at just the right energy, what kind of photon incoming energy you've got? And it, yeah, pretty much tops out around 30% efficiency for a silicon system. Now, if you have triple gun junction gallium arsenide, do a lot better, but it's very expensive.