A new LED light emitting method of gradient refractive index structure invented by American students

Ma Ming, a doctoral student at Rensselaer Polytechnic Institute in New York, recently won a $30 thousand grant to develop a new way to make a light emitting diode - changing the surface of the diode. New ways to produce more light, reduce the impact on the environment and the overall cost.

After the transformation of the LED of each light is increased to 70%, while the market most of the LED only issued 25%, this is through the creation of thousands of tiny star pillar on the surface of LED, the star by 5 nanometer layer is specially designed to help shed light on. Ma said that the nano structure as a gradient refractive index (GRIN) structure".

Ma Ming said: LED lights and traditional light source compared with the characteristics of high efficiency, but compared with their theoretical limits their efficiency is not high. If we can increase the light output, will be able to effectively improve efficiency. "