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The European scholars research and development is expected to replace the white LED lamp

August 23, 2014 | Comments Off on The European scholars research and development is expected to replace the white LED lamp

The European scholars research and development is expected to replace the white LED lamp

An international joint research team recently demonstrated a white LED (WLED), known as the world’s first high color rendering index (highcolor-renderingindex). The technology is expected to sweep away the last obstacle to replace incandescent bulbs and fluorescent tubes white LED in the world.
White LED power consumption is much lower than traditional light bulbs, but the market LED itself only with single-wavelength light; therefore the only way to obtain white light from the LED is red, green and blue LED hybrid package together, and in the blue LED crystal the yellow phosphorescent agent (yellowphosphors), or using its active region (activeregion) can emit blue, while the matrix can be issued the yellow zinc selenide (zincselenide) material.

The above method can generate approximate white light, suitable for general lighting applications; However, after the color rendering index (CRI) tests for professionals who need to be able to regenerate all colors in the visible spectrum, these methods do not apply.

Professor at the University of Wuppertal, Germany ElisabethHolder her colleagues the joint Turkey Ankara’s Bilkent University Professor HilmiVolkanDemir, to develop a new program, it is said, can produce white light LED claimed to be able to provide a very high color rendering index, so that it can meet the painter, gardening application needs of the family and other professionals.

The researchers said that the key to this new technology the the inorganic luminescent nanoparticle (inorganicluminescentnanoparticles), embedded in a highly fluorescent organic polymer substrate (highlyfluorescentorganicpolymerbase), followed by a near-UV LED this mixture out, resulting in a can produce white led lights mixed organic / inorganic LED. It is said that this white light, including almost all wavelengths of the spectrum, so accurately display almost any color.

The focus of this research is the combination of organic and inorganic materials; through a layer-by-layer (layer-by-layer), the researchers used a plated the zinc silicon (zincsilicon) cadmium selenide (cadmium-selenium) yellow, green and red fluorescent nanoparticles embedded into a blue fluorescent organic matrix (polymatrix, or polyfluorene), and then the mixture was adjusted to achieve more than 80 CRI (sunlight of CRI of 100, incandescent bulbs CRI over 90. the fluorescent LED CRI 70 fluorescent tubes and 65). After further optimization, the researchers hope to be able to improve its CRI value to 100.