MIT creates a 230% efficient LED system...

[oneshot]

Pretty crazy!

http://www.lighting.co.uk/news/mit-...s-its-surrounding-environment/8627537.article

Researchers at MIT recently unveiled the LED which has an energy efficiency of over 200%
A group of researchers in the US have unveiled an LED which emits more light energy than it consumes in electrical energy.

Researchers from the Massachusetts Institute of Technology (MIT) unveiled the LED, which has a conventional efficiency of greater than 200 per cent.

This means that unlike traditional halogen lamps and newer LEDs, instead of producing heat this LED will instead cool its surroundings.

Lead researcher, Parthiban Santhanam of MIT, said: “The most counterintuitive aspect of this result is that we don’t typically think of light as being a form of heat. Usually we ignore the entropy and think of light as work.”

The possibility of such a device was first predicted in 1957, but a practical version was seemingly impossible to create until now.

Jukka Tulkki of Aalto University in Finland, told physicsworld.com: “I think this is a historically important breakthrough…that could eventually lead to more useful and technologically relevant applications.”

Alongside energy-efficient lighting other potential applications of the LED could include cryogenic refrigeration.

The research is published in Physics Review Letters.

Link to published paper:
http://prl.aps.org/abstract/PRL/v108/i9/e097403

 

[GMT]

its bullshit, another perpetual energy device.

 

[rives]

Maybe not. What I get out of it is that the LED is not powered exclusively by electricity. Rather, it converts heat to light for the balance of the process. Interesting notion, but I don't think that gives it an efficiency of over 200% - they are only measuring the electrical energy component. Damned neat idea!

 

[AVG 2.0]

so.
ridiculously.
improbable.
file away with 20 lbs. off 1000 watts and the are aliens real thread.
doesn't even merit a thought.

 

[dank.frank]

Guys...this is MIT - not University of Phoenix online....

I'm extremely interested in this - not to convert my entire room - but finally the perfect supplemental lighting to HPS. These LED's in blue, balancing spectrum AND cooling the room...

WHAT!!!!

I want some!!



dank.Frank

 

[Banefoul]

people before saying not true or bs.. please learn about tesla and the shit that has been hidden from you all in the name of profits.

 

[40AmpstoFreedom]

Doesn't get better than MIT. I will wait until I have the education to give an opinion on this one. For now I find it interesting.

 

[WeedIsGod]

That LED is 200% efficient. This is not the first I've heard about it. HOWEVER, the light levels are laughably low. We're not talking horticulture here, it's tech talk measuring very minute units, and there are no "real life" applications for the technology yet.

It is real.

For our intents and purposes a 200% efficient LED is still a pipe dream.

 

[hush]

LOL @ stoners calling bullshit on MIT geniuses. lmao

 

[FunkBomb]

I hope some of this technology makes its way to the marketplace. I passed by a gas station the other day with white LED overhead lights instead of metal halides. I must admit it was really cool.

-Funk

 

[dank.frank]

Yeah, I read another article on it and it says they are looking for ways to implement the findings into magnetic telecommunication fields - so...lol - yeah, it's a LONG shot off for us gardeners. But still, we shouldn't be so fast to shun the possibilities of technology...

There world is an ever changing place and to live with a mindset that forces one to deny all break-throughs must be depressing....



dank.Frank

 

[growingcrazy]

Extremely small Peltier cooler that converts heat energy to light energy? Is that a possibility?

 

[stoney917]

Shit sounds insane 20lbs per 1000w possible????? Lol an but all seriousness hell of an inovention but let's see how our lady's liken before I get to excited this may actually be a step in the right direction.... Props to MIT I'd be glad to tested out...

 

[GMT]

WOW, I knew science was poor in the states, but seriously, dont you understand what 200% means? it means that it produces twice as much power as it consumes. a series of such devices connected to solar panels would not only be self sustaining in terms of power, but also produce excess power that could be drained off. If this was real, it would not only end the worlds reliance on fossil fuels, but also solve the global warming issue. Pop a few on the poles and save the ice caps for a starters. Just take some time to ask why this isnt the headline on the news, and in all the papers if you cant get your head around the scientific principles at play.

 

[rives]

As I alluded to above, I think that the 200%+ figure is neglecting to account for the power extracted from ambient heat. It may well be giving out over 200% of the electrical power that it consumes, but electricity is not it's only power source.

 

[hush]

Here is an accompanying article that was found on the same webpage the OP links to:

Physicists have known for decades that, in principle, a semiconductor device can emit more light power than it consumes electrically. Experiments published in Physical Review Letters finally demonstrate this in practice, though at a small scale.

The energy absorbed by an electron as it traverses a light-emitting diode is equal to its charge times the applied voltage. But if the electron produces light, the emitted photon energy, which is determined by the semiconductor band gap, can be much larger. Usually, however, most electrons create no photon, so the average light power is less than the electrical power consumed. Researchers aiming to increase the power efficiency have generally tried to boost the number of photons per electron. But Parthiban Santhanam and co-workers from the Massachusetts Institute of Technology in Cambridge took a gentler approach, achieving power enhancement even though less than one electron in a thousand produced a photon.

The researchers chose a light-emitting diode with a small band gap, and applied such small voltages that it acted like a normal resistor. With each halving of the voltage, they reduced the electrical power by a factor of 4, even though the number of
electrons, and thus the light power emitted, dropped by only a factor of 2. Decreasing the input power to
30 picowatts, the
team detected nearly 70 picowatts of emitted light. The extra energy comes from lattice vibrations, so the device should be
cooled slightly, as occurs in thermoelectric coolers.

These initial results provide too little light for most applications. However, heating the light emitters increases their output power and efficiency, meaning they are like thermodynamic heat engines, except they come with the fast electrical control of modern semiconductor devices.

 

[habeeb]

shits over my head, but I was friends with 3 guys who graduated from MIT when I was in Boston.. there smart cats for sure.. some reason they liked me with no college education though..haha. I never brought up growing weed with them ever, that was for sure

anyways, remember, what we know today will change tomorrow..

 

[GMT]

I'll try to explain this:

What they have done is found a way of reducing the power this NORMALLY takes by 75% and only reducing the power output by 50%. This doubles the efficiency of the process and so increases the efficiency BY 100%, NOT TOO 200% of the power it consumes. Its like taking a car that does 20mpg at 100mph and making it do 40mpg at 25mph.

I'm not calling bullshit on MIT, I'm calling bullshit on journalists and companies that sell lighting products for misrepresenting science in order to drum up some hype for themselves.

And please remember that when the media tells you stoners are all stupid, you don't need to believe it, people from all walks of life smoke weed.

 

[Avinash.miles]

got my attention......

 

[rives]

What they have done is found a way of reducing the power this NORMALLY takes by 75% and only reducing the power output by 50%. This doubles the efficiency of the process and so increases the efficiency BY 100%, NOT TOO 200% of the power it consumes. Its like taking a car that does 20mpg at 100mph and making it do 40mpg at 25mph.

There appears to be a bit more going on than that. "Decreasing the input power to [FONT=MathJax_Main]30[/FONT] picowatts, the team detected nearly [FONT=MathJax_Main]70[/FONT] picowatts of emitted light. The extra energy comes from lattice vibrations, so the device should be cooled slightly, as occurs in thermoelectric coolers." From the abstract - "is shown to use electrical work to pump heat from the lattice to the photon field". It sounds similar to a residential heat pump - the total heat gain for the residence is higher than the electrical input.