Researchers discovered a new way to fill the short of the green and white LED

the Saudi Arabian king abdullah university of science and technology ( 阿卜杜拉国王科技大学(KAUST) And the old king city science and technology ( 阿卜杜勒阿齐兹国王科技城,KACST) Researchers put forward a novel method, to fill in based on phosphor white LED application due to the poor conversion efficiency by the common lime ( 绿色- - - - - - 黄色的差距) 。

using two temperature step growth method of element structure SEM figure ( Embedded in the nanowires Qdisks electronic microscope photo)

posted on the ACS Photonics research papers in the journal & ndash; — 真正的黄灯, 发光二极管作为可调颜色——磷 呈现指数激光- -based White Light, the description of a 588 nm emission nanowire leds ( 西北LED) , and can be compatible with CMOS process of low cost titanium ( Ti） Film/silicon ( Si) Grow on base board platform. Its close nanowires layer can grow up to nine x109 c ㎡ surface density, fill factor of 88%.

element structure shows that the growth of nanowires

more side by side with each line of p - 我- - - - - - N LED structure embedded in a 5 3 nm thick layer of InGaN quantum disk ( Qdisk) Stack and become active areas, and between each layer to 10 nm off quantum barrier layer.

in a separate operating yellow nanowires, LED researchers at 29. 5 A/c㎡ （ At zero. 5 x0。 About 75 ma) 5 m ㎡ element Observe the peak emission and about 2 to 588 nm. 5 v low turn-on voltage, internal quantum efficiency by about 39%, and up to 29. 5 a/c ㎡ before injection density, not as to the possibility of low efficiency.

then, researchers show mixed the yellow and red, green and blue laser diodes. In actual Settings, use RGB beam yellow nanowires LED, like phosphors, and using light scattering layer in reflection configuration, add the yellow light emission in the mixture of white light.

the result is correlated color temperature is about 6000 k, and 87. 7 color rendering index.

yellow nanowires LED KACST solid-state lighting director of the center for technology innovation, and electrical engineering professor Boon S. Ooi, said the goal of this method is to lower the blue light, white light to create a more friendly, warm white light to the human eye, at the same time, based on laser solid state lighting ( SSL) Provide a new method for tuning color temperature. At present, we have been to the technology patents, which suggests that some business opportunities in the future.

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