News - Researchers develop cheaper and more efficient OLED displays

[HEXUS]

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

Read more.

[scaryjim]

Anyone else worried by this line:

“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?

[kalniel]

He knows why:

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

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.

[DemonHighwayman]

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

[JohnPombrio]

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.

[scaryjim]

And now so do you

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

[kalniel]

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.

[MDOI]

heat? really?

[kalniel]

heat? really?

What else would it be wasted as?