"Commander Kinsey" wrote in message
news
On Thu, 03 Oct 2019 14:37:34 +0100, whisky-dave
wrote:

On Thursday, 3 October 2019 14:29:30 UTC+1, Commander Kinsey wrote:
Why do LEDs generate heat? I want a technical answer not "because
they're inefficient".

That is the technical answer just lioke why does a wire get hot when
curremnt passes through it.

No, the technical answer would explain what part of it has resistance

The diode that produces the light.

and if it can be overcome by using different materials.

There are no light emitting diodes which don't have resistance.

And are you sure it's even resistance?

Yes it is. And trivial to measure that.

It could be some photons are reabsorbed before they escape the LED,
generating heat.

Nope.

And will we ever make them more efficient?

Probably.