Incandescent on a Chip

CoveAxe

Enlightened
Joined
Jun 10, 2014
Messages
245
Seeing as commercial-scale graphene is a long ways off, I wouldn't hold my breath. My guess is that even if it were, the luminous efficacy just wouldn't be able to compete with LED or even perhaps CFL. Incandescence is just a terribly inefficient way to generate light.

Pretty cool technology though. Lots of neat things can be done with graphene, just the manufacturing is a huge obstacle.
 

Anders Hoveland

Enlightened
Joined
Sep 1, 2012
Messages
858
The researchers say the light correlated to a temperature of 2500 °C, that is equivalent to 2773K. I wonder if there may be some photonic crystal effects here and the actual filament temperature may actually be significantly lower.

Normally the issue with incandescent is that the filament tends to gradually sublime (evaporate) at such a high heat. Even tungsten starts displaying a vapor pressure at 2700K; at 3300K the filament does not last long at all. I am not sure how graphene behaves at such elevated temperatures.
 
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