Samsung has to own say a breakthrough in led technology achieved which makes very large leds on the basis of simple and inexpensive glass substrate are to be produced. Currently to do this is sapphire glass as the substrate used.
The researchers from the Samsung Advanced Institute of Technology, or SAIT, succeeded in securing a monocrystalline galliumnitridelaag to grow on a substrate of normal glass instead of sapphire crystal. This makes it according to the researchers, possible to have very large leds to produce, as is read in the Korean Herald.
The largest GaN-leds, which are currently on sale, have dimensions of approximately five inches, because of the limited size of the saffierwafers. With the new technology is, however, possible to use such leds to four hundred times as large to produce. The expectation is that the production costs of leds will dramatically decrease. The brightness of the new GaN-leds is 600cd/m2.
Samsung is the new GaN-leds used for lighting purposes and for ‘advanced displays’. So can windows in buildings will serve as a source of illumination or as a display, according to one of the researchers. Samsung expects there ten years before the technology is ready for production. The results of the research of SAIT are published in Nature Photonics.
Incidentally, it seems that Samsung is not the first that we managed to GaN-leds on the basis of simple glassubstraten to produce. In January 2009, researchers from the University of Cambridge the same breakthrough in led technology.
