New LED first converts electricity into light with an efficiency of 230%


12/03/2012

Physics from the Massachusetts Institute of Technology (MIT) have developed a light-emitting diode, the electrical efficiency in excess of 100 percent. You might ask, is not this a violation of the first law of thermodynamics. The answer, fortunately, no.

The LED 69 produces light PW, PW 30 using energy, which gives 230 percent efficiency. Because it produces more energy than it consumes, it allows you to place it in the category of so-called perpetual motion.

Nevertheless, although the diode MIT allocates twice photon energy than it consumes energy of the electrons, it does not violate the law of conservation of energy. Where does the extra energy? From the heat of the surrounding space. Upon reaching the efficiency of electricity above 100 percent, the system starts to cool down, consuming energy from the environment and converting it into photons.

According to the scientists, they used the LED with a small bandgap, and used more and more small voltage. Each voltage drops twice, the electric power decreased by four times, and the power of the emitted light was reduced to only twice. The extra energy came from the lattice vibrations.

Scientists have described in detail his findings in the journal Physical Review Letters. They wrote: "For the first time it has been experimentally confirmed that this behavior may be beyond the accepted limit of efficiency of conversion of electric energy into optical equal to unity."

69 PW of the world - this is, of course, a very small amount, so you will not be able to light up your home with this LED. However, it may obtain application in low-power electronics, as the thermodynamic heat engine having a rapid electric control.

Original: Wired


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