Bulb terminator debut, high color rendering index white LED successfully developed

An international joint research team recently demonstrated the world's first to achieve a high color rendering index of white light-emitting diode LED (WLED). This will clear the white LED in the world to replace incandescent bulbs and fluorescent lamp the last obstacle.

The energy consumption of white LED is much lower than the energy consumption of traditional bulbs. However, the traditional LED itself can only emit a wavelength. Therefore, the only way to get from the white light LED is red, green and blue LED together, let the yellow light into the blue LED lens inside or into ZnSe and other new materials, at the same time from the active region to emit blue light and emit yellow light from the bottom. These methods can make seemingly white light, therefore suitable for general lighting, but the color index (CRI) test found that, for those who need to regenerate all colors of light in the visible spectrum of professionals, these methods are not applicable.

Today, ELisabeth professor Holder Wuppertal and colleagues combined with the German university professor Hilmi Volkan Demir Ankara Bilkent of the University of Turkey, to develop a new scheme to make according to the white LED can provide high color rendering index, which is suitable for home gardening from the painter to professional users.

According to the researchers, the key of this new technology is the inorganic luminescent nanoparticles embedded into a highly fluorescent organic polymer base, followed by a near ultraviolet LED will take this mixture to form hybrid organic / inorganic LED can produce white light. This white light includes almost all wavelengths, so it can accurately display almost any color.

The team's focus is on combining organic and inorganic materials. By using a layer by layer method, researchers can (cadmium and selenium galvanized silicon) will be yellow, green and red fluorescent nanoparticles embedded into a fluorescent blue organic matrix, and thus adjusting the mixture to achieve more than 80 color display index (daylight for 100 incandescent lights is 90. Based on the fluorescence of LED and 65 nm for fluorescent tube. After further optimization, these researchers are expected to raise the CRI to 100.

Source: power system