The new LED technology development De to reduce cost and prolong the life of the

According to Science Daily, LED is more and more widely used, but at present two kinds of methods of production of the white LED is not the cost is too high, is the product of short service life, limited the development of the industry. Recently, researchers at the University of Erlangen in Germany Nuremberg -- using fluorescent protein materials, developed a new production technology, the white LED production becomes simple and cheap, safety and environmental protection, but also prolongs the service life of the products increased significantly.

Compared with incandescent lamps, halogen lamps and other lighting materials, white LED has the advantages of long service life, high energy efficiency, environmental protection and has the advantages of easy maintenance, but the disadvantage is the high price, which is mainly caused by the production process is relatively complex. White LED production usually has two methods: one is on the surface of the blue LED is coated with a phosphorus or rare earth inorganic materials, the production of white LED, long service life, good brightness, but the process is more complex, and the cost is high; the other is the use of organic LED, between the two electrodes embedded in the shape like a sandwich a plurality of organic semiconductor layer, this process is relatively simple, but the product brightness and service life to the poor.

An ideal method is to combine these two kinds of process, researchers at the University of Erlangen in Nuremberg is based on this idea to carry out research. The cooperation of Dr. Costa and professor of synthetic biology Thorne Wald Department of advanced materials engineering of the University, the invention of a production process is simple and cheap. They will be on a fluorescent protein rubber material, and then embedded into LED. Costa said that the fluorescent protein both environmentally friendly and cheap, but also easy to color, white or color can be controlled. The only drawback is the only fluorescent protein in the buffer solution is stable, so it cannot be applied in the conventional coating process. In addition, researchers must also solve the problem of stability of fluorescent protein in high temperature and moist environment etc..

Therefore, researchers have developed a new coating technology. They will be on a fluorescent protein gel material, the gel made from a blend of protein solution and a polymer composition, polymer is the role of the protein solution is connected to the network gel, and maintain the necessary humidity. They through vacuum drying the gel into a rubber material, then used for multilayer coating white LED. Costa said that they used this method successfully made the long service life, high efficiency, environmentally friendly and cheap white LED. He said, this process is expected to be applied to the industrial production of the next generation of LED.

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