News - Researchers develop cheaper and more efficient OLED displays

Quote:

---

In current OLEDs only a quarter of the energy input goes into producing light.

---

Read more.

Anyone else worried by this line:

Quote:

---

“It appears that, in our OLEDs, the molecules can store electrical energy for significantly longer than is conventionally assumed,” said Chemistry Professor Sigurd Höger of the University of Bonn.

---

Is it just me, or is he basically saying that he doesn't know why this happens?

He knows why:

Quote:

---

Originally Posted by the paper

a triplet relaxation bottleneck to internal conversion that is so effective that radiative emission can even arise from higher-lying triplets in electroluminescence (EL)

---

And now so do you :p

The appears to thingy is probably because by doing so they're bypassing a convention on internal radiation conversion - they're not actually breaking it, they're working around it.

I always thought OLED was really efficient with its energy use ! I hope this new tech will apply to lcd, plasma etc

LEDs are not very efficient either, around the 25% range. They too lose the energy as heat. It will be interesting to see if this spills over to the huge LED lighting market, the more efficient the better.

Quote:

---

Originally Posted by kalniel

And now so do you :p

---

:confused: nope, i really don't.... ;)

Or do I? Is he saying that they don't actually store electrical charge for longer but they can emit light for more of the storage period?

Nope, on second thoughts, I *really* don't get it ;)

Well you know why now, you just don't *understand* why ;)

My guess: By storing charge longer, there's time for more of the magnetic moments flip to a beneficial arrangement that means less repelling and thus wasting of energy as heat.

heat? really?

Quote:

---

Originally Posted by MDOI

heat? really?

---

What else would it be wasted as?