Less energy higher brightness nanowire LED five years within the commercial
According to the University of Copenhagen, Denmark (University of Copenhagen) Bohr Institute (Niels Bohr Institute; NBI) study confirmed that the use of nanowires made of LED just use less energy, can provide brighter light.
Researchers looked at the use of X-ray microscopy nanowires Through this method, the researchers were able to determine how to design nanowires to enable it to provide the best performance. The study was published in "ACS Nano" scientific journals.
Nanowire size of about 2 microns in height only (μm; 1μm is 1000 mm), a diameter of about 500 nm (nm, 1nm to about 1 / 1000μm). Designed for LED is used by the internal nanowire gallium nitride (GaN) core and an outer layer of indium gallium nitride (InGaN) formed, both of which are semiconductor materials.
This diode light source depends on the presence of mechanical strain between the two materials, and this strain is significantly depending on how the contact with each other between the two layers of material. Professor, University of Copenhagen and Bohr Institute Robert Feidenhansl explanation, we study a variety of X-ray microscopy nanowires, or even on the same principle nanowires, we can see the difference between them and quite different structure.
Related research is the use of nano-scale X-ray microscopy performed in Hamburg, Germany, "DESY" (DESY) electron synchrotron. Although this method is very time consuming, but the result is usually very limited or even only to meet a single research topics. However, with nanoscale X-ray of a special design, the nanowire can not be destroyed in the process, allowing researchers to simultaneously measure a series of smooth nanowires.
X-ray image is displayed on each nanowire scattering intensity distribution, as well as gallium indium gallium outer core and mechanical strain. According to this strain show the outer layer and the core perfect fit.
"We measured the 20 kinds of nanowires, and when we were very surprised to see the video, because you can clearly see the details of each nanowire, including both core and the outer structure if the structure has any defect or slightly curved, does not work properly, so we can find out what exactly is the best quality nanowires, and a core / shell structure of the most efficient, "Niels Bohr Institute, University of Copenhagen" Neutron and X-ray doctoral scattering "explained Tomas Stankevic research team.
Robert Feidenhans'l said nanowire LED will bring more natural light, but also use less power. In addition, they can also be used in smart phones, televisions and various forms of lighting.
Researchers expect that the nanowire LED lighting can be commercialized within five years.
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