Sorry, you can flaunt all you want, but I both have direct experience working with silicon semiconductors (i.e. digital design) and work directly with individuals who design the machines that create gallium arsenide chips.Originally Posted by astonas
All is clear now. You seem to think that my comments are directly exclusively to GaN LEDs, when all I'm noting is that there are shared physics based constraints between LEDs and semiconductors. And to be specific, semiconductors used for analog and digital design.Originally Posted by astonas
Yet I have specifically noted that there are fundamental differences between designs intended to perform analog/digital calculations vs. designs intended to generate light:
So, to return to the question:This is different than standard semiconductors where electrons are primarily used as electrical current.
Sure, LEDs do also use electrons to generate electrical current, but this is secondary to what they are intended to do: generate light.
Are hot electrons only what you describe:
The answer is NO. For a physicist, this would be true, but in real life the cause and the effect are related.Originally Posted by astonas
A physicist might say that a car driving off a cliff is one event, and the car landing on someone underneath is a separate one, but engineers understand that one doesn't occur without the other.
This is all fine and interesting, but I fail to see how your LED expertise leads you to be able to categorize all hot electrons.Originally Posted by astonas
If you're trying to say that hot electrons in GaN LEDs are fundamentally different than in silicon or GaAs semiconductors - I'd be happy to say that you should know GaN LEDs better.
I, however, have worked for years on hot electron (as well as other related) fields in both silicon and GaAs designs, so know your comments are not correct for all instances. Equally, to be sure, I checked with several of my friends who create the machines which in turn create both GaN and GaAs products. They also have fancy schmancy degrees and what not, but more importantly design, field, and maintain the multi-million dollar machinery which has to do the industrial work of producing LEDs, solar panels, and what not. They too have dozens of patents. They validated what I said: hot electrons for high voltage designs primarily affect performance - to be specific they trigger discharges earlier than expected. Given that there are probably charge pumps and what not involved in building up voltages, I can see how this would affect LED overall output. However, hot electrons for smaller/lower voltage devices primarily affect behavior through structural damage exactly as I noted above.
But ultimately the issue is: you think you know all there is to know about hot electrons.
If you said you know everything there is to know about hot electrons in GaN LEDs, then I would bow to that - although I don't how much you necessarily know about hot electrons in the non-light generating aspect of the LED (i.e. the control and setup circuitry).