In Russia developed infrared LED, the efficiency of which was greater than one

The research team, led by Dr. Physical and Mathematical Sciences Boris Matveyev, a member of the laboratory infrared optoelectronics St. Petersburg Physico-Technical Institute of Abram Ioffe and forming the backbone of the company’s innovative "IoffeLED", has developed an infrared LED, the efficiency of which was significantly greater than one. Such a seemingly fantastic result was obtained recently Fiztekh Fellows colleagues from the laboratory of electronics (Research Lab of Electronics) at the Massachusetts Institute of Technology (MIT), which are used in his experiments directly from St. Petersburg device.

No violations of the laws of thermodynamics are not here, the general director of "IoffeLED" Maxim Belt. According to scientists, the efficiency of semiconductor devices is inversely proportional to the power, and when the voltage at the terminals of the power consumption in the diode drops a lot faster (square) than the power of the radiation incident linearly. At first glance, strange and contrary to the rate of high school physics efficiency value is based on a deep physics of the processes occurring in the solid state in the interaction with the surrounding semiconductor heat. This interaction, in which the energy of the photon exiting the semiconductor exceeds the energy expended in the electric displacement pn junction, and is accompanied by radiative (or radiative) cooling system, predicted in theoretical studies of several authors in the late 50-ies of the last century. But in 2012, the Americans were able to conduct an experiment to register and confirm the possibility of efficiency by a factor greater than one.

In experiments with silicon LED MIT immersion lens, produced in the "IoffeLED" when heated to a certain temperature (and it is varied in the experiment), the network 30 has consumed power PW, but gave 69 as light optical power PW. LED, as well as in theory, converted into radiation not only talk of "sockets", but also the additional heat from the crystal lattice of the semiconductor, so that the direct calculation of ‘rosette’ consumption efficiency was 230 percent.

Back in the 60 years of the last century, it was clear that the injection of radiation sources, such as LEDs, have great prospects as compared to incandescent light sources, that is, ordinary light, thanks to the direct conversion of electrical energy into the energy of the photon. That is why at the present time we are seeing a gradual process of replacing traditional sources of visible light to LED. In the mid-infrared (2-5 microns), that is in an area not accessible to the human eye, but important for some applications, such as those associated with the measurements of gaseous media, and the transition to LED sources. Scientists believe that the development of ideas related to the conversion of additional heat can cause the LED lights are not created in the course of the excess heat, or to new methods of cooling circuits.

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