I would have said that the physics is actually pretty simple. Electrons losing energy dropping down the band gap in the semiconductor will emit photons. Working out the chemistry to get the band gap energy for the right color of light you want is the much harder part. (My physics courses were over 50 years ago...nothing farther up the spectrum than green LEDs existed at the time.)*: the thinking goes like this - once the smoke comes out, the thing doesn't work. So it must be the magic smoke kept inside the LED that makes it work. Yes, that definition would make Nakamura Shūji (inventor of the blue LED) cry because there's some difficult physics that is behind why LEDs work.
Statistics: Posted by W. H. Heydt — Mon Mar 25, 2024 11:26 pm