QD-LEDs emit over whole visible spectrum

comozo · Jun 29, 2009

Researchers in the US have shown that a universal structure can be used to make hybrid organic-quantum-dot light-emitting devices that emit over the entire visible spectrum. These QD-LEDs might find use in RGB flat-panel displays in which red, green and blue QD pixels are deposited in one simple, inexpensive step.

more QD-LEDs emit over whole visible spectrum - optics.org

bshanahan14rulz · Jun 29, 2009

IIRC, a member on here, R33E, is working on making LEDs incorporating QDs to achieve a higher CRI in his studies at a Uni. I think it would be great, but I wonder how well QD stand up to heat of an overdriven LED? Still, high cri is never bad :thumbsup:

Gomer · Jun 29, 2009

http://www.evidenttech.com/products/evidot-leds.html

JohnR66 · Jul 1, 2009

Evidot LEDs seem very expensive unless you can buy thousands of them. It seems a better deal to buy one of their light strings and hack out the LEDs from them for about 50 cents a LED. I don't know the type of LED used (5mm, 3mm?). I have heard that the white ones are not really all that bright, but I'm sure they will improve in time.

clg0159 · Jul 1, 2009

Gomer said:
http://www.evidenttech.com/products/evidot-leds.html

These are not worth the money IMO. My guess is about 3500mcd. Here is a thread about them:
https://www.candlepowerforums.com/threads/231166

EricB · Jul 8, 2009

So what exactly is this? An LED pixel with five dies side by side, using RGB with amber and cyan?

Gomer · Jul 8, 2009

The OP's images just appears to be the emission from UV (or near?) excited quantum dots in a cuvette. Think of it as an "alternative" to phosphors.

R33E8 · Jul 9, 2009

Yeah, the excitation is probably well under 400nm for those pictures.. I remember the first quantum dots I made had a peak excitation at around 320nm... I have my QD's excitation at 420nm now with a nice smooth emission

.. It's getting harder the closer I get to 450nm..

QD-LEDs emit over whole visible spectrum

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